Smartwatches / Compare

Amazfit T-Rex Ultra 2 vs Garmin Instinct E

A

Product A: Amazfit

T-Rex Ultra 2

91 of 150 known

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B

Product B: Garmin

Instinct E

85 of 150 known

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All 150 fields

Every value links to where we found it.

Only differences

AAmazfit T-Rex Ultra 2

BGarmin Instinct E

General

6 of 10 differ

Series

T-Rex1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Amazfit T-Rex family. The page compares it with the T-Rex 3, T-Rex 3 Pro and T-Rex Dual Solar.

Instinct1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

W2550GL2N2Maker product pageus.amazfit.com/products/t-rex-ultra-2.jsonRead 15 October 2026Store feed variant SKU W2550GL2N for the single option.

010-02932-00, 010-02933-00, 010-02933-011Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Page data lists 010-02933-00 (Black with Charcoal Band) and 010-02933-01 (Electric Lime with Electric Lime Band) for 45 mm and 010-02932-00 for 40 mm. A retailer also lists a 40 mm Electric Lime part 010-02932-01 that the Garmin US store does not sell. It is not stored.2Maker product pagegarmin.com/en-US/p/1314137/pn/010-02932-00Read 16 October 2026

GTIN / EAN

850071618860, 69725961097302Maker product pageus.amazfit.com/products/t-rex-ultra-2.jsonRead 15 October 2026US store feed barcode 850071618860. The German store feed carries 6972596109730 under its own SKU TREXU2-C1207005003.

753759339449, 753759339463, 75375933947012Retailer pageheartratemonitorsusa.com/collections/garmin/products/garmin-instinct-e-rugged-outdoor-gps-smartwatchRead 16 October 2026Variant table gives UPC 753759339449 for 010-02932-00, 753759339463 for 010-02933-00 and 753759339470 for 010-02933-01. The playbetter Shopify variant barcodes agree for the two 45 mm colours.13Retailer pageplaybetter.com/products/garmin-instinct-eRead 16 October 2026Shopify variant barcodes: 753759339463 for 45 mm Black/Charcoal and 753759339470 for 45 mm Electric Lime.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

19 February 20266Press releasezepp.com/press-release/amazfit-announces-the-t-rex-ultra-2-a-titanium-gps-watch-engineered-for-the-extremeRead 15 October 2026Press release dated 19 February 2026.

6 January 20258Press articletomsguide.com/wellness/smartwatches/the-garmin-instinct-3-just-launched-at-ces-and-its-a-rugged-and-affordable-rival-to-the-fenix-8Read 16 October 2026Published 6 January 2025 at the CES launch of the Instinct 3 series.9Reviewdcrainmaker.com/2025/01/garmin-instinct-3-series-hands-on-everything-you-need-to-know.htmlRead 16 October 2026Post dated 6 January 2025: Garmin announced the Instinct 3 series and the Instinct E.10Spec databasethe5krunner.com/specs/garmin/instinct-eRead 16 October 2026Announced 6 January 2025.

Status

Available1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026The store lists the single option at 549.99 USD and the add to cart button is active.

Available1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Both sizes show a $249.99 US price and 1 to 3 day shipping on the access date.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$549.996Press releasezepp.com/press-release/amazfit-announces-the-t-rex-ultra-2-a-titanium-gps-watch-engineered-for-the-extremeRead 15 October 2026549.99 USD in the US. Prices exclude sales tax.

$299.998Press articletomsguide.com/wellness/smartwatches/the-garmin-instinct-3-just-launched-at-ces-and-its-a-rugged-and-affordable-rival-to-the-fenix-8Read 16 October 2026The article rounds the Instinct E price to $299. The exact $299.99 comes from the5krunner and a US retailer MSRP table. US prices exclude sales tax.9Reviewdcrainmaker.com/2025/01/garmin-instinct-3-series-hands-on-everything-you-need-to-know.htmlRead 16 October 2026Instinct E $299 for the 40 mm and $299 for the 45 mm, rounded.10Spec databasethe5krunner.com/specs/garmin/instinct-eRead 16 October 2026Launch price $299.99 for both sizes.12Retailer pageheartratemonitorsusa.com/collections/garmin/products/garmin-instinct-e-rugged-outdoor-gps-smartwatchRead 16 October 2026MSRP column shows $299.99 for each size and colour.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

€549.94Maker product pagede.amazfit.com/products/t-rex-ultra-2.jsonRead 15 October 2026The German store lists 549.90 EUR including VAT. It matches the nextpit list price. The German price is stored as the euro launch price.7Spec databasenextpit.de/smartwatches/amazfit-t-rex-ultra-2Read 15 October 2026UVP 549.90 EUR including VAT.

€299.9914Spec databasenextpit.de/smartwatches/garmin-instinct-e-45mmRead 16 October 2026German database lists the UVP as 299,99 EUR for the 45 mm. Its 40 mm page also gives 299,99 EUR. The page gives April 2025 as market start, which conflicts with the January 2025 order date. VAT is included.

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

US1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026US store part numbers only.

ColoursiThe maker's own colour names

Black Magma1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Spec table: Black Magma. The store sells one colour and one size.

Black with Charcoal Band, Electric Lime with Electric Lime Band1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Maker colour labels as shown on the US store.2Maker product pagegarmin.com/en-US/p/1314137/pn/010-02932-00Read 16 October 2026

Segment

Outdoor1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Amazfit sells it as a rugged outdoor GPS smartwatch in its T-Rex range.

Outdoor1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Garmin sells it as a rugged GPS smartwatch in the Instinct line.

OS updates promisediYears of explicitly promised OS updates. A security-only support period does not establish an OS-upgrade promise.

Not available

Not available

Security updates untiliExact end date published for security-update support of this model. Do not calculate it from a stated number of years. A security-only period does not promise OS upgrades.

Not available

Not available

Case

6 of 8 differ

Case sizeiMarketed case-size options. The marketed size can differ from physical case height, such as ceramic editions. Base dimensions describe the smallest base-material case.

51mm1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026One case size, 51 mm. Compare table: case diameter 51 mm.

40, 45mm1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 20262Maker product pagegarmin.com/en-US/p/1314137/pn/010-02932-00Read 16 October 2026

Case shape

Round1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026The display is round and the product images show an octagonal bezel around a round dial. Stored as round, like the T-Rex 3 Pro.

Round1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026No text states the shape. The maker product photos show a round case outline around a square display window.

Case materialiMaterial of the housing body, not just the bezel. Use Mixed when the maker describes a mixture of housing/frame materials. Read the published-material field for the parts and proportions.

Mixed materials1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Body Material: case in fiber-reinforced polymer. Bezel, buttons and back panel in Grade 5 titanium. Stored as mixed. The marketing text says 51 mm Grade 5 titanium body, which the spec table does not support for the whole case.

Fibre-reinforced polymer1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Case material (as published)

Case in fiber-reinforced polymer. Bezel, buttons and back panel in Grade 5 titanium1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Technical specifications, Body Material row.

Fiber-reinforced polymer case and fiber-reinforced polymer bezel1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab: case material and bezel material are both fiber-reinforced polymer.

BackiMaterial of the back of the smallest base-material case. Other materials or regional editions can differ. See source notes.

Grade 5 titanium1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Technical specifications: back panel in Grade 5 titanium. The press release says titanium bezel and case back.

Not available

Case dimensionsiPhysical case height, width and thickness. The source note states exclusions such as the heart-rate sensor protrusion.

Height51Width51Thickness14.3mm(2 × 2 × 0.6 in)1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Dimensions without heart rate base: 51 x 51 x 14.3 mm. The UK comparison table gives the same figure. The US comparison table lists a thickness of 15.1 mm without the heart rate sensor, which conflicts with the 14.3 mm in the spec table. The spec table value is stored.

Height40Width40Thickness13.6mm(1.6 × 1.6 × 0.5 in)1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab Physical size, 45 x 45 x 14.2 mm for 45 mm. The 40 mm value is on the 40 mm page. The table does not say whether the sensor bump is included.2Maker product pagegarmin.com/en-US/p/1314137/pn/010-02932-00Read 16 October 2026Specs tab Physical size 40 x 40 x 13.6 mm for the 40 mm size.

Weight (case only)iWatch body without a strap. An unqualified published weight must not be assumed to exclude the strap.

Not available

Not available

Weight with strapiWatch with the stated strap attached. Strap material and case size belong in the source note. Reviewer measurements belong in measured fields.

89.2g(3.1 oz)1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Weight (with strap): 89.2 g. The standard silicone strap with a pin buckle. The maker does not publish a case-only weight.

Not available

Durability

5 of 8 differ

Water resistanceiStatic water-pressure rating in atmospheres. It is not a safe swimming or diving depth. Diving limits are listed separately.

10ATM1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Water-resistance grade 10 ATM. Note 8 says it is rated to ISO 22810:2010 for up to 100 m and passed SGS testing.

10ATM1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 20263Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Specifications: 10 ATM. Footnote: withstands pressure equivalent to a depth of 100 m.

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Note 8: according to ISO 22810:2010 the watch achieves 10 ATM.

Not available

Dust and water rating

Not available

Not available

Dive rating

EN13319:2000, ISO 6425:2018, GB/T 18828-20221Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Note 9 names EN13319:2000, ISO 6425:2018 and GB/T 18828-2022 with report numbers. It also says the watch uses the Buhlmann ZHL-16C decompression model.

Not available

Max dive depthiMaker-rated depth for the stated diving use, not a conversion from the water-resistance pressure rating.

45m1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026FAQ: certified for diving and supports depths up to 45 m for freediving and recreational scuba diving.

Not available

MIL-STD-810iMaker claim that the watch was tested against specified MIL-STD-810 methods. It is not a guarantee for every military-standard test.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Note 1: MIL-STD-810H-2019 data comes from report H202512228939-01EN. The tested methods are not listed.

Yes1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Overview: engineered to MIL-STD-810 for thermal and shock resistance. Only those two tests are named.

MIL-STD-810 tests

Not available

Thermal resistance, Shock resistance1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Thermal and shock resistance named in the Overview tab.

Operating temperatureiPublished operating range. Source notes identify on-wrist limits and other operating conditions. Storage or charging limits are excluded.

Min-30°C1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Low Temperature Mode keeps essential functions responsive down to -30 C. It is off by default and switches on when the watch surface is below -10 C (note 10). No upper limit is published.

Min-20Max60°C3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Specifications page 65: operating and storage range -20 to 60 C. The 0 to 45 C USB charging range is excluded.

Display

10 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

MIP1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab: monochrome, sunlight-visible, transflective memory-in-pixel (MIP).

Display type (as published)

AMOLED1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Display Material: AMOLED.

Monochrome, sunlight-visible, transflective memory-in-pixel (MIP)1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Screen sizeiPublished active display diagonal for a rectangular display, or diameter for a round display. Do not calculate it from pixels or display area.

1.5in(3.8 cm)1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Size: 1.5 inch.

Not available

Resolution

480 × 480px1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Resolution 480 x 480.

166 × 166px1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab: 176 x 176 pixels for 45 mm. The page also calls the display a custom two-window design of 0.9 x 0.9 inch (23 x 23 mm), which is not a diagonal, so screen size is not stored.2Maker product pagegarmin.com/en-US/p/1314137/pn/010-02932-00Read 16 October 2026Specs tab: 166 x 166 pixels (active area) for 40 mm.

Pixel densityiPublished pixel density. A rectangular diagonal formula must not be applied to a round display.

322ppi1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026PPI 322 as published.

Not available

Display area

Not available

Not available

Touchscreen

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026The spec table row labelled Touchscreen names sapphire glass. The manual describes tap and swipe gestures, so touch is confirmed there.5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026Commonly used gestures and buttons: tap and swipe on the screen.

No1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026The Specs tab has no touchscreen entry and the manual controls are buttons only.12Retailer pageheartratemonitorsusa.com/collections/garmin/products/garmin-instinct-e-rugged-outdoor-gps-smartwatchRead 16 October 2026Comparison table: no touchscreen, 5-button navigation.

Max refresh rateiHighest published display refresh rate in active operation.

Not available

Not available

Min refresh rateiLowest published display refresh rate, usually in always-on mode. It is not the active-use minimum unless stated.

Not available

Not available

Peak brightnessiMaker peak-brightness claim. It may apply to a small area or bright ambient light. Full-screen limits and battery/temperature conditions belong in source notes.

3,000nits1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Peak brightness up to 3,000 nits. Note 17: not supported in low temperature mode or when battery is below 30%, and needs automatic brightness.

Not available

Minimum brightness

Not available

Not available

Always-on display

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Battery table lists an AOD mode figure. The manual describes Settings > Display > Always On Display.

Not available

Display cover

Sapphire1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

Other glass1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Display cover (as published)

Sapphire glass1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Screen material: sapphire glass. The Touchscreen row of the spec table also says sapphire glass.

Chemically Strengthened Glass1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Platform

4 of 15 differ

Platform

Proprietary1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Zepp OS, Zepp Health's own operating system.

Proprietary1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

OS at launch

Zepp OS 53Maker product pageuk.amazfit.com/products/t-rex-ultra-2Read 15 October 2026The UK comparison table lists OS Zepp OS 5 for the T-Rex Ultra 2.

Not available

Software

Not available

Not available

Latest OS

Zepp OS 69Press articlegadgetsandwearables.com/2026/07/22/amazfit-t-rex-3-pro-ultra-2-zepp-os-6-updateRead 15 October 2026Article of 22 July 2026: Zepp OS 6 starts rolling out to the T-Rex 3, T-Rex 3 Pro and Ultra 2.

Not available

Works with

iOS, Android1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Supported devices: Android 7.0 and above, iOS 15.0 and above. Application: Zepp App.

iOS, Android1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Phone requirement

Android 7.0 and above, iOS 15.0 and above, with the Zepp App1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Supported Devices and Application rows.

Not available

App store

Yes5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026App installation: more apps install from the app store in the Zepp App.

Yes1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab lists Connect IQ (downloadable watch faces, data fields and apps) and the on-device Connect IQ store.

Voice assistants

Zepp Flow1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026AI assistant: Zepp Flow, in select countries and regions. Note 11 lists the supported languages.

Not available

Chipset

Not available

Not available

Process

Not available

Not available

CPU cores

Not available

Not available

CPU configuration

Not available

Not available

Max CPU clock

Not available

Not available

GPU

Not available

Not available

Low-power coprocessor

Not available

Not available

Memory

1 of 2 differ

RAMiKeep published GB values as stated. Convert a source explicitly labelled MB using 1000 MB per GB and preserve its original figure and unit in the note. Do not assume MB means MiB. Convert explicit MiB or GiB to decimal GB through their byte definitions, recording the conversion in the note. This normalization does not establish an exact physical byte count.

Not available

Not available

StorageiTotal built-in storage the maker states, in decimal GB. Space available to the user is lower and goes in the source note. A figure the maker gives only as available space is not stored.

64GB1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Storage (note 18): Total 64 GB. Available 26.7 GB for maps, music, mini programs, records and watch faces because the system uses the rest. The total is stored.

128 MB1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab Memory/History 128 MB, stored as 0.128 GB. The table does not say how much is free for the user.

Health sensors

4 of 8 differ

Heart rate sensor

BioTracker 6.0 PPG biometric sensor (5PD + 2LED)1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Sensors, Health: BioTracker 6.0 PPG biometric sensor (5PD + 2LED).

Garmin Elevate Gen 412Retailer pageheartratemonitorsusa.com/collections/garmin/products/garmin-instinct-e-rugged-outdoor-gps-smartwatchRead 16 October 2026Comparison table names Elevate Gen 4 HR. The maker names Garmin Elevate without a generation and a Canadian retailer spec table also says Gen 4.

ECG capabilityiElectrical heart sensing hardware with an ECG capability. The ECG app can require an eligible country, age and paired phone.

Not available

No11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Electrical heart rate is listed as absent. The maker sensor list names only the optical sensor and Pulse Ox.

Blood oxygen sensingiBlood-oxygen sensing capability. App availability and medical status vary by market.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 202624H monitoring and manual blood-oxygen saturation. Not a medical device (note 13).

Yes1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Skin temperature sensingiA sensor or supported function that measures skin temperature. It is not a core-body thermometer.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 202624H monitoring lists skin temperature (thermometer).

No11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Skin temperature is not listed. The maker thermometer shows ambient temperature in the temperature glance.

Blood pressure featureiPublished blood-pressure feature category. Hypertension notifications are not numerical blood-pressure readings.

Not available

Not available

Body composition sensor

Not available

Not available

Skin conductance (EDA)

Not available

No11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Galvanic skin response is listed as absent.

Medical clearancesiNamed regulatory clearances and their jurisdiction. General water resistance or an ECG sensor does not establish medical clearance.

Not available

Not available

Motion and environment sensors

4 of 9 differ

Accelerometer

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

Yes1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

No10Spec databasethe5krunner.com/specs/garmin/instinct-eRead 16 October 2026Sensor table: gyroscope No. The maker sensor list has no gyroscope either.11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Gyroscope listed as absent.

Barometric altimeter

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

Yes1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Compass

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Outdoor tools list Compass and the movement sensors include a geomagnetic sensor.

Yes1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Sensors, Movement: ambient light sensor.

No11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Ambient light sensor listed as absent. The maker sensor list has none.

Depth gauge

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Dive tracking shows time and depth. The manual states the maximum measurement depth.

Not available

Depth gauge rangeiPublished measurement range of the depth gauge, distinct from maximum diving depth and water-pressure resistance.

45m1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Manual: maximum measurement depth 45 m. The page says dives up to 45 m.5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026Diving Technical Specifications: maximum measurement depth 45 m / 147.6 ft, accuracy per EN13319.

Not available

Water temperature sensor

Not available

Not available

Health and fitness

5 of 5 differ

Health featuresiSupported health functions with country, phone and subscription restrictions in the source notes. Upcoming functions are not counted as available.

Continuous heart rate, Heart rate alerts, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 202624H heart rate, blood oxygen and stress, abnormal high and low heart rate alerts, sleep heart rate variability, sleep stages including REM, and HybridCharge energy intelligence with BioCharge. The software notes mention a Readiness app. Not a medical device.

Continuous heart rate, Heart rate alerts, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Cycle tracking1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab: constant heart rate, high and low abnormal heart rate alerts, Pulse Ox, HRV status, advanced sleep, all-day stress and women's health in Garmin Connect. Pulse Ox is not available in every country. Sleep stages are named in the manual. Training readiness and training load are not listed.3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Sleep score glance shows sleep stage information. Pulse oximeter, wrist HR, HRV status and women's health are described.

Fitness featuresiSupported workout functions. A sport-profile name alone does not prove advanced metrics such as running power or running dynamics. Trackback follows the recorded route back to the start. A compass arrow that points straight to the start does not count.

Automatic workout detection, VO2 max, Training load, Recovery advice, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback, Golf courses, Ski resort maps1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Smart recognition of 8 sports movements, VO2 Max (note 12), Training Load, recovery, pool and open-water swim, strength training with recognition of 25 movements, interval training via the watch, offline maps, turn-by-turn directions, direct return navigation, 40,000+ golf course maps and ski resort maps. Ground contact time and vertical amplitude are named in the marketing copy but not stored because the page does not say whether they need an external sensor.5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026Return to the starting point: straight line return or Backtrack along the route already travelled, which is the trackback option.

VO2 max, Recovery advice, Running dynamics, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Trackback, Climb detection1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab: VO2 max, recovery time, running dynamics, open-water and pool swim metrics, automatic rep counting, interval training, course guidance, TracBack and trail run auto climb. Turn-by-turn directions, running power and training load are not listed.3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Running Dynamics: the watch has an accelerometer for five running form metrics and the sixth needs an accessory. Auto Climb detects elevation changes with the altimeter. TracBack is under Back to Start.

Sport profilesiPublished count of distinct sport/activity profiles. A claim such as 180+ is not an exact integer count.

1871Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Sports Features row: 187 sports modes. Marketing copy says 180+.

Not available

Dive modesiActual supported dive modes. Water resistance or a depth app alone does not establish decompression-capable scuba support.

Scuba, single gas, Freedive1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Pro-grade waterproofing: recreational scuba diving and freediving with automatic dive detection. Note 9: Buhlmann ZHL-16C decompression model. The manual says no mixed-gas diving.

Not available

External sensorsiTypes of external workout sensors the watch can pair with. GPS reception, phone data and built-in sensors do not qualify.

Heart rate strap, Power meter, Speed and cadence, Foot pod, Smart trainer1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Peripherals: heart rate belt, running power meter, Stryd foot pod, cycling power meter, cycling speed and cadence sensors. The September 2026 software notes add FTMS indoor bike trainers and rowing machines. Note 15: only BLE devices are supported.

Heart rate strap, Power meter, Speed and cadence, Foot pod1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab: ANT+ and Bluetooth, foot pod capable, speed and cadence sensor support, HR broadcast. Chest HR straps and power meters are named in the manual.3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Wireless Sensors table: external heart rate monitors, foot pod and speed/cadence sensors. VO2 max for cycling requires a paired power meter.

Safety

4 of 6 differ

Fall detectioniAutomatic fall detection. Incident detection restricted to recorded workouts is not counted as general fall detection.

Not available

No3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Incident detection works only during certain outdoor activities, so it is not general fall detection. Stored false.

Car crash detection

Not available

Not available

Emergency SOSiA manual emergency alert to emergency services or preset contacts. Source notes identify the recipient, paired-phone requirement and country limits. Satellite is listed separately.

Not available

Yes1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab lists Assistance. The manual says it messages preset contacts through a paired phone and does not call emergency services.3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Hold CTRL requests assistance. It sends a message with a LiveTrack link and GPS location to emergency contacts through a paired phone with data. It does not contact emergency services.

Emergency sireniPublished or measured siren sound level in decibels. Audible distance alone does not establish this value. Measurement distance belongs in source notes.

Not available

Not available

Live location sharingiShares live location during supported use. A paired phone or data subscription may be required.

Not available

Yes1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab lists live event sharing and the Overview names LiveTrack. A paired phone with data is needed.3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026LiveTrack lets friends and family follow activities in real time. It needs a paired phone with data.

Dedicated LED flashlightiA dedicated hardware LED flashlight. Lighting the display white is not counted.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Flashlight with 4 white levels, 1 green mode and Boost Mode.

No3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026The flashlight screen lights the display. No LED is described.9Reviewdcrainmaker.com/2025/01/garmin-instinct-3-series-hands-on-everything-you-need-to-know.htmlRead 16 October 2026The post says the Instinct 3 has the flashlight and the Instinct E does not.11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026LED flashlight listed as absent.

Positioning

3 of 3 differ

PositioningiPublished satellite systems and signal bands. Do not infer bands from dual-frequency support alone.

GPS, GLONASS, Galileo, BeiDou, QZSS, NavIC8Reviewcomputerwoche.de/article/4171180/amazfit-t-rex-ultra-2-im-test-grose-starke-und-robuste-outdoor-smartwatch.htmlRead 15 October 2026The test names the six systems as GPS, GLONASS, Galileo, BeiDou, QZSS and NavIC with dual-band GNSS. The maker states six systems and does not name them. Signal bands are not stored.

GPS, GLONASS, Galileo1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab Sensors lists GPS, GLONASS and Galileo.

Dual-band GNSSiMaker-stated dual-frequency satellite reception. Supported constellations and signal bands are listed separately.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Positioning: dual-band positioning and 6 satellite positioning systems with a circularly-polarized GPS antenna.

No3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Satellite Settings offers Off, GPS Only, All Systems and UltraTrac. No multi-band option exists. Stored false.12Retailer pageheartratemonitorsusa.com/collections/garmin/products/garmin-instinct-e-rugged-outdoor-gps-smartwatchRead 16 October 2026Comparison table: multi-GNSS, single-band.

Offline mapsiMap data stored on the watch and usable without live phone data. GPX routes or breadcrumb tracks alone are not offline maps.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Navigation and maps: offline maps supported. Full-colour base maps are preloaded.

No11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Built-in maps listed as not supported.

Connectivity

9 of 15 differ

BluetoothiPublished Bluetooth support for this model. The version is recorded separately. Unknown version does not mean the radio is absent.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Connection: Wi-Fi 2.4 GHz, Bluetooth 5.2, BLE.

Yes1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 20264Regulatory filingstatic.garmin.com/pumac/Instinct%20E,%2045%20mm.pdfRead 16 October 2026Report names a Bluetooth Low Energy transceiver. No Bluetooth version is stated.

Bluetooth version

5.21Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Connection row: Bluetooth 5.2, BLE.

Not available

Wi-FiiPublished Wi-Fi support for this model. The standard and bands are recorded separately. Unknown standard does not mean Wi-Fi is absent.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Connection: Wi-Fi 2.4 GHz. OTA update via Wi-Fi is supported.

No1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab Connectivity lists only Bluetooth and ANT+.10Spec databasethe5krunner.com/specs/garmin/instinct-eRead 16 October 2026Wi-Fi No.11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026

Wi-Fi standard

Not available

Not available

Wi-Fi bands

2.4 GHz1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Connection row lists 2.4 GHz only.

Not available

CellulariTrue when a cellular edition is sold. A variant row states whether that individual model has cellular hardware.

No1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Connection lists Wi-Fi 2.4 GHz, Bluetooth 5.2 and BLE only. No cellular radio is listed.

No1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab Connectivity lists only Bluetooth and ANT+. No cellular edition is offered.11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026

Network

Not available

Not available

4G bandsiPublished LTE bands for the stated regional cellular model. Do not transfer bands to another region or Wi-Fi-only model.

Not available

Not available

5G bandsiPublished 5G NR bands for the stated regional cellular model. RedCap support does not establish conventional full-bandwidth phone 5G.

Not available

Not available

NFCiSome regions sell an NFC edition, so it is per variant.

Yes3Maker product pageuk.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Zepp Pay text: integration of NFC technology. The usage scenarios also count NFC card swipes.8Reviewcomputerwoche.de/article/4171180/amazfit-t-rex-ultra-2-im-test-grose-starke-und-robuste-outdoor-smartwatch.htmlRead 15 October 2026The spec table lists NFC (Zepp Pay). In Germany payment works only through the third party Curve.

Not available

Contactless payments

Yes3Maker product pageuk.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Zepp Pay binds up to eight bank cards for password-protected contactless payment. Note 16: supported by Curve and participating issuer banks in 31 European countries. The US page does not mention Zepp Pay.

No11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026NFC and contactless payments listed as not supported. The maker feature list has no Garmin Pay.

Payment services

Zepp Pay3Maker product pageuk.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Zepp Pay, via Curve and participating issuer banks in 31 European countries.

Not available

Ultra-wideband

Not available

No11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Ultra-wideband listed as not supported.

Satellite

Not available

None11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026No satellite SOS listed.

ANT+

No1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Note 15: peripheral connections only support BLE devices. ANT+ is not listed.

Yes1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 20264Regulatory filingstatic.garmin.com/pumac/Instinct%20E,%2045%20mm.pdfRead 16 October 2026Report names a Bluetooth Low Energy transceiver and an ANT transceiver.

Audio

4 of 4 differ

Speaker

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Mic and Speaker: Support.

No11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Speakers listed as absent.

Microphones

Not available

011Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Microphone listed as absent.

Calls on the watchiVoice-call capability of the marketed model, including sold cellular editions. Variant radio capability and paired-phone requirements still apply.

Phone only1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026FAQ: the watch supports Bluetooth phone calls and texts. Calls use the paired phone.

None11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Bluetooth calling listed as not supported.

Music on the watchiPlays audio stored on the watch. Remote control of phone playback or streaming alone does not qualify.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Music Storage: Support. The manual says local mp3 files play through the speaker.

No10Spec databasethe5krunner.com/specs/garmin/instinct-eRead 16 October 2026Music storage No.11Spec databasegadgetsandwearables.com/technical-specs/garmin-instinct-e-45-mmRead 16 October 2026Onboard music storage listed as not supported.

Controls

3 of 5 differ

ButtonsiPhysical controls used to operate the watch, excluding the rotating crown and strap-release buttons. A clickable rotating crown is counted only in Crown.

41Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Buttons: 4.

53Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Page 5 Buttons: LIGHT/CTRL, UP/MENU, DOWN/ABC, GPS and BACK/SET.

Named operating buttonsiNames of operating buttons, excluding the crown and strap-release controls.

UP, SELECT, BACK, DOWN5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026UP, DOWN, upper right SELECT and lower right BACK. Press and hold UP turns the flashlight on.

LIGHT / CTRL, UP / MENU, DOWN / ABC, GPS, BACK / SET3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Page 5 button names.

CrowniA crown that rotates to control the interface. A round push button that does not rotate is not a crown.

None5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026No crown is described. Controls are four buttons and the touchscreen.

None3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026The control overview shows five push buttons and no crown.14Spec databasenextpit.de/smartwatches/garmin-instinct-e-45mmRead 16 October 2026Crown: no.

Rotating bezeliPhysical rotation or touch gestures around the display edge. A fixed decorative bezel is None.

None5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026No rotating bezel is described.

None3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026The control overview shows no bezel control.

Gestures

Not available

Raise and turn wrist to wake display3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Changing the Screen Settings: Gesture turns on the screen by raising and turning your arm.

Battery and charging

7 of 13 differ

Battery capacityiPublished battery capacity for the stated case size. Rated and typical capacity are distinguished in source notes.

870mAh1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Battery Capacity: 870 mAh (rated value).

Not available

Claimed battery lifeiMaker endurance claims with distinct operating modes and case sizes. With solar describes augmentation of that estimate, not hardware capability. Use false for ordinary claims without solar augmentation, true for explicitly solar-aided claims, and omit it when solar qualification is unclear. Source notes state AOD, GNSS, music and solar conditions. Do not create a normal-use row from an AOD-only claim. Low power denotes the maker battery-saver mode. Keep its typical, light-use and always-on claims separate from standard-mode claims. GPS power saving identifies an intermediate reduced-accuracy GNSS saving preset. Source notes retain the maker's preset name and published conditions. Max battery GPS is the distinct maximum-saving claim. When the maker has only one GPS saving preset, it is GPS power saving.

AAmazfit T-Rex Ultra 2

Mode	With solar	Hours (h)
Smartwatch	No	720
Heavy use	No	360
Always-on	No	240
GPS, dual-band	No	50
GPS, power saving	No	90
Max battery GPS	No	177

Source1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Typical use up to 30 days (720 h, note 7 scenario). Heavy use up to 15 days. AOD mode up to 10 days, tested with the heavy-use workload and AOD on. Accurate GPS up to 50 h with heart rate on and dual-frequency, all satellites. Power-saving GPS up to 90 h, single frequency. GPS Max Battery Life 177 h, only in Hiking and Climbing modes with heart rate, Bluetooth and wrist raise off. Not stored: trail running normal 44 h and heavy 30 h, low temperature mode 40 h with GPS and 32 days without, since the schema has no mode for them.

BGarmin Instinct E

Mode	With solar	Hours (h)
Smartwatch	No	336
Low power	No	840
GPS	No	21
GPS, all systems	No	14
Max battery GPS	No	43
Expedition	No	408

Source1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 202645 mm column: smartwatch up to 16 days, battery saver watch mode up to 40 days, GPS up to 24 h, all satellite systems 16 h, max battery GPS up to 50 h, expedition GPS up to 20 days. Days converted exactly to hours. Maker estimates, no solar. The base row is the 40 mm size and each variant holds its own size.2Maker product pagegarmin.com/en-US/p/1314137/pn/010-02932-00Read 16 October 202640 mm column: smartwatch up to 14 days, battery saver watch mode up to 35 days, GPS up to 21 h, all satellite systems 14 h, max battery GPS up to 43 h, expedition GPS up to 17 days. Days converted exactly to hours.3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Pages 65 and 66 Battery Life Information table matches the product page for both sizes.

Smartwatch mode (claimed)iMaker normal-use smartwatch claim without solar. A watch with only an explicit AOD-mode claim has no value here. Workloads differ and source notes must be read.

720h=CalculatedFrom Claimed battery life

336h=CalculatedFrom Claimed battery life

AOD battery life (up to)iMaker claimed smartwatch endurance with the always-on display enabled and without solar, for the base case. Source notes preserve workload and case conditions. This is a claim, not a measured test or an AOD-off estimate.

240h=CalculatedFrom Claimed battery life

Not available

GPS mode (claimed)iMaker regular GPS/GNSS activity claim without solar, for the base case. AOD, multi-band, music and power-saving conditions have separate rows when published.

Not available

21h=CalculatedFrom Claimed battery life

Solar chargingiPublished solar charging hardware capability. An ordinary battery estimate without solar augmentation does not prove that the watch lacks solar charging hardware.

No1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Compare table: solar charging not supported.

No12Retailer pageheartratemonitorsusa.com/collections/garmin/products/garmin-instinct-e-rugged-outdoor-gps-smartwatchRead 16 October 2026Not-included list names solar charging. The maker battery table has no solar claims.

Charging methodiThe connection at the watch, not the cable end at the USB adapter. A proprietary inductive puck is not Qi unless interoperability is explicitly established.

Not available

Proprietary plug1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab: Garmin proprietary plug charger.

Charging guidanceiPublished charging requirements, nominal estimates and compatibility guidance. Keep adapter ratings separate from power accepted by the watch.

Magnetic charging head. The box has a charging base that works with USB Type-C but no cable. The store FAQ says a USB-C cable is not supplied.1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Packing list: magnetic charging head (no cable). What's in the Box: charging base (USB Type-C compatible) but no cable. FAQ: no USB-C cable included.

Use the supplied proprietary charging cable with a USB-C computer port or an AC adapter rated for at least 5 W. The adapter rating does not establish power accepted by the watch.3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Page 65: proprietary cable to a USB-C computer port or AC adapter with a 5 W minimum rating.

Max charging power (watch)iPublished maximum charging power at the watch. Adapter rating or charger input power does not prove the power accepted by the watch.

Not available

Not available

Fast chargingiAn explicit fast-charging capability claim. A short charging time or high adapter wattage alone does not qualify.

Not available

Not available

Quick charge claimiMaker claim for usage from a short charge. Source notes identify the usage workload, such as normal use or sleep tracking.

Not available

Not available

Charge 0 to 80% (claimed)iMaker claim for charging an empty battery to 80%. Charger and approximate qualifiers belong in source notes.

Not available

Not available

Full charge time (claimed)iMaker advertised nominal full-charge duration. Approximate or theoretical maker estimates are allowed, with their conditions in source notes. Partial-charge intervals do not qualify. Measured 0 to 100% tests have a separate field.

Not available

Not available

Measured

None of 4 known

Peak brightness (measured)iReviewer measurement. Source notes state screen area, mode and ambient light. A small-area peak claim cannot be replaced with a full-screen measurement.

Not available

Not available

Battery life (measured)iReviewer-observed mixed-use endurance. Source notes state case size, AOD, workout use and whether it was a complete discharge. Extrapolation from partial discharge is excluded.

Not available

Not available

Battery tests (measured)iReviewer-observed endurance, with case size and test settings in source notes. Partial-discharge projections are not stored as measured endurance.

Not available

Not available

Full charge time (measured)iReviewer measurement from empty to full, not 0-80% or a charge from 5%. Source notes name the charger and case size.

Not available

Not available

Strap

5 of 6 differ

Lug widthiDistance between standard strap attachment lugs, not the decorative width of a proprietary strap. Unknown for custom connectors unless the maker publishes lug width.

26mm1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Strap width 26 mm.

20mm1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab QuickFit watch band compatible: 22 mm for 45 mm and 20 mm for 40 mm.2Maker product pagegarmin.com/en-US/p/1314137/pn/010-02932-00Read 16 October 2026Specs tab QuickFit watch band compatible: yes (20 mm).

Quick-release strapiThe supplied strap can be detached through its quick-release mechanism. Compatibility with quick-release replacement straps alone does not qualify.

Yes1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Compare table: strap attachment 26 mm quick release.

No3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Changing the Spring Bar Bands: the supplied bands detach by pushing in the watch pin. QuickFit bands need a compatible watch pin. This is not a quick-release lever, so false.

Strap systemiPublished attachment system and compatible case sizes. Proprietary connectors are distinguished from standard spring bars.

26 mm quick release1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Compare table: strap attachment 26 mm quick release.

Spring bar bands. QuickFit compatible with a compatible watch pin (20 mm on the 40 mm case, 22 mm on the 45 mm case)3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026Page 66: Instinct E bands are spring bar bands. QuickFit bands fit with a compatible watch pin.

Strap materialiMaterial of the supplied strap for the stated package. Do not substitute material from another band sold separately.

Silicone1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Strap materials: silicone. Buckle: classic pin buckle.

Silicone1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Strap

Not available

Charcoal Band1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Garmin names the colourways Black with Charcoal Band and Electric Lime with Electric Lime Band.

Strap sizesiPublished wrist-circumference range for the stated strap or case. Source notes distinguish an overall compatible wrist range from one supplied strap size.

AAmazfit T-Rex Ultra 2

Wrist (min) (mm)	Wrist (max) (mm)
145	215

Source1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Min. and max. wrist dimensions: 145-215 mm.

BGarmin Instinct E

Size	Wrist (min) (mm)	Wrist (max) (mm)
Supplied silicone band	107	179

Source1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Specs tab: fits wrists with a circumference of 132 to 213 mm for 45 mm. This describes the supplied silicone band.2Maker product pagegarmin.com/en-US/p/1314137/pn/010-02932-00Read 16 October 2026Specs tab: fits wrists with a circumference of 107 to 179 mm for the supplied silicone band.

Regulatory

1 of 3 differ

FCC ID

Not available

IPH-04880, IPH-048814Regulatory filingstatic.garmin.com/pumac/Instinct%20E,%2045%20mm.pdfRead 16 October 2026Garmin compliance test report cover for Instinct E, 45 mm: model A04881, FCC ID IPH-04881, IC 1792A-04881.5Regulatory filingstatic.garmin.com/pumac/Instinct%20E,%2040%20mm.pdfRead 16 October 2026Garmin compliance packet for Instinct E, 40 mm: model A04880, FCC ID IPH-04880, IC 1792A-04880. Cellular and Wi-Fi radios are not listed.

SAR limb (US)iPublished limb/wrist SAR for the stated base regional model under the US regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

Not available

Not available

SAR limb (EU)iPublished limb/wrist SAR for the stated base regional model under the EU regime. Other case sizes or radio versions can differ. Head or body SAR is excluded.

Not available

Not available

Other certifications

Not available

EU declaration of conformity: Radio Equipment Directive 2014/53/EU and RoHS 2011/65/EU, ISED Canada: 1792A-04880 (40 mm), 1792A-04881 (45 mm), Regulatory model A04880 (40 mm), A04881 (45 mm)4Regulatory filingstatic.garmin.com/pumac/Instinct%20E,%2045%20mm.pdfRead 16 October 2026Garmin compliance packet for Instinct E 45 mm names ISED ID 1792A-04881. The 40 mm packet names 1792A-04880.5Regulatory filingstatic.garmin.com/pumac/Instinct%20E,%2040%20mm.pdfRead 16 October 2026ISED ID 1792A-04880 for the 40 mm size.6Maker spec sheet (PDF)static.garmin.com/pumac/Instinct%20E%2040mm_DoC-EU.pdfRead 16 October 2026EU declaration of conformity for model A04880, Instinct E 40mm, under Directives 2011/65/EU and 2014/53/EU. A04881 is the 45mm model in the sibling declaration.

In the box

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In the box

Smartwatch (including standard strap), Magnetic charging head (no cable), Instruction manual1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Packing list verbatim.

Instinct E 40 mm smartwatch with silicone band, Charging/data cable, Documentation1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026In the Box tab, shown for the 45 mm size.2Maker product pagegarmin.com/en-US/p/1314137/pn/010-02932-00Read 16 October 2026In the Box tab for the 40 mm size.

Power adapter in boxiA mains/USB power adapter is supplied. A charging cable, inductive puck or charging dock alone does not count.

No1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026The packing list has a charging head and no USB cable or power adapter.

No1Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Box lists the watch, a charging/data cable and documentation. No mains adapter.

Links

Not compared

Product page

us.amazfit.com/products/t-rex-ultra-21Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026

www.garmin.com/en-US/p/13158171Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026

Spec sheet

Not available

www.garmin.com/en-US/p/13158171Maker product pagegarmin.com/en-US/p/1315817Read 16 October 2026Public Specs tab of the same page. No separate datasheet was found.

Manual

support.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdf5Owner's manualsupport.amazfit.com/en/amazfit_t-rex_ultra_2/files/user-manual.pdf.pdfRead 15 October 2026Amazfit T-Rex Ultra 2 user manual, global version.

www8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdf3Owner's manualwww8.garmin.com/manuals/webhelp/GUID-D3C2D1F9-D2C0-404D-9372-7B2D57459BF8/EN-US/Instinct_E_OM_EN-US.pdfRead 16 October 2026

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

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Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

1year1Maker product pageus.amazfit.com/products/t-rex-ultra-2Read 15 October 2026Store footer says 1 Year Warranty. This is the US store.

1year7Maker product pagewww8.garmin.com/manuals/webhelp/GUID-E72F728A-C9B4-4294-967D-EA17F5462A5C/EN-US/GUID-80997D2B-7430-427E-A14E-6115C8D079B6.htmlRead 16 October 2026Garmin Consumer Limited Warranty text: non-aviation products are covered for one year from the date of purchase. This is the US text hosted in another Garmin manual. A US retailer also lists a 1 year manufacturer warranty.

Both are also in the API. Back to all smartwatches.