Smartwatches / Compare

Amazfit Active Max vs Garmin Forerunner 255

A

Product A: Amazfit

Active Max

85 of 150 known

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B

Product B: Garmin

Forerunner 255

81 of 150 known

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Every value links to where we found it.

Only differences

AAmazfit Active Max

BGarmin Forerunner 255

General

7 of 10 differ

Series

Active1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Forerunner1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Product page title is Forerunner 255, running smartwatch, 46 mm.

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

W2557AP1N2Maker product pageus.amazfit.com/products/active-max.jsRead 14 October 2026Store product data: SKU W2557AP1N, the only variant, Default Title. Manual model numbers A2556 and A2557 cover the global and the US edition. The EU edition W2556GL1N and its NFC are not added.

010-02641-011Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026US page for the 46 mm watch without music lists part number 010-02641-01 (Tidal Blue, $349.99). The Music toggle on the same page links the music watch to 010-02641-20, so music watches are other models. 255S is the 41 mm size, SKU 010-02641-02.

GTIN / EAN

8500716187612Maker product pageus.amazfit.com/products/active-max.jsRead 14 October 2026Store barcode 850071618761.

Not available

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

30 December 20253Press releasenasdaq.com/press-release/amazfit-introduces-active-max-bigger-brighter-and-built-maximum-performance-2025-12Read 14 October 2026

1 June 20223Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026Garmin release dated June 1, 2022.

Status

Available1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Store page shows Add to cart, the product is in stock at 169.99 USD on the accessed date.

Not available

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

Garmin Forerunner 2658Reviewdcrainmaker.com/2023/03/garmin-forerunner-review-amoled.htmlRead 11 October 2026Review: the Forerunner 265 series at first glance seems like an AMOLED version of the Forerunner 255, with several hardware differences. It follows the 255 in the Forerunner line.10Maker product pagegarmin.com/nl-NL/blogRead 23 October 2026Garmin's Dutch blog says the Forerunner 265 is the successor of the Forerunner 255.

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

$1693Press releasenasdaq.com/press-release/amazfit-introduces-active-max-bigger-brighter-and-built-maximum-performance-2025-12Read 14 October 2026Pricing and Availability: $169.00 on Amazfit.com and Amazon. The US store lists 169.99 USD today. Tom's Guide names the starting price as $169.

$349.993Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026Suggested retail price $349.99 for Forerunner 255 and 255S. Music models are $399.99.

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.

Not available

€349.994Press articlenextpit.de/news/garmin-forerunner-255-und-955-vorgestellt-touchscreen-mehr-akkuRead 11 October 2026nextpit.de, 1 June 2022: the Forerunner 255 costs 349,99 EUR in every size, the Music edition 50 EUR more. German price incl. VAT.

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

US1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

US, DE3Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026US release with US dollar suggested retail prices.4Press articlenextpit.de/news/garmin-forerunner-255-und-955-vorgestellt-touchscreen-mehr-akkuRead 11 October 2026German launch pricing in euros. Documented subset together with the US release.

ColoursiThe maker's own colour names

Black1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Tidal Blue1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026US store lists Tidal Blue for this model. Other regional colours exist but are not listed on this page.3Press releasegarmin.com/en-US/newsroom/press-release/sports-fitness/garmin-celebrates-global-running-day-with-the-introduction-of-the-forerunner-255-seriesRead 11 October 2026Release names tidal blue as a new colour.

Segment

Sport1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Active family positioned for training. Tom's Guide calls it a sports-oriented smartwatch.

Sport1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin presents it as a running smartwatch.

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

5 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.

48.5mm1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Case width and height 48.5 mm. Colour: Black only.

46mm1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Case shape

Round1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Round1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs describe the display as a diameter and the pictured case is round.

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/active-maxRead 14 October 2026Technical Specifications > Body Material: Frame: Aluminum Alloy, Case: Polymer. Stored as mixed.

Fibre-reinforced polymer6Reviewandroidcentral.com/wearables/garmin-forerunner-255-reviewRead 11 October 2026Review spec box: materials fiber-reinforced polymer. The maker lists only the bezel as fiber-reinforced polymer and no other case material.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: fiber-reinforced polymer bezel and case, silicone strap.

Case material (as published)

Aluminum alloy frame with polymer case1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Fiber-reinforced polymer6Reviewandroidcentral.com/wearables/garmin-forerunner-255-reviewRead 11 October 2026Review spec box wording.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table wording.

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

Not available

Not available

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

Height48.5Width48.5Thickness12.2mm(1.9 × 1.9 × 0.5 in)1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Technical Specifications > Dimensions (without heart rate base): 48.5 x 48.5 x 12.2 mm.

Height45.6Width45.6Thickness12.9mm(1.8 × 1.8 × 0.5 in)1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Physical size 45.6 x 45.6 x 12.9 mm. Not stated whether the heart rate sensor bump is included.

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

39.5g(1.4 oz)1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Weight (without strap): 39.5 g. No weight with strap is published.

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.

Not available

Not available

Durability

2 of 8 differ

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

5ATM1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Water-Resistance Grade 5 ATM. Footnote 14: 50 m static, tested to ISO 22810:2010 by TUV-SUD.4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026Basic Parameters: water resistance rating 5 ATM. Repair and Maintenance says the watch cannot be used for snorkeling, diving or high-speed water activities.

5ATM1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Water rating 5 ATM.

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Footnote 14: according to ISO 22810:2010, passed third-party testing by TUV-SUD.

Not available

Dust and water rating

Not available

Not available

Dive rating

Not available

Not available

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

Not available

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.

Not available

Not available

MIL-STD-810 tests

Not available

Not available

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

Min0Max45°C4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026Basic Parameters, model number A2556/A2557: working temperature 0 to 45 C. Reseller-hosted copy of Amazfit's Product Manual (importer Beryko).

Min-20Max60°C2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Specifications page 101: operating temperature -20 to 60 C. Charging range 0 to 45 C is excluded.

Display

10 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

MIP1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Display type sunlight-visible, transflective memory-in-pixel (MIP).

Display type (as published)

AMOLED1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Sunlight-visible, transflective memory-in-pixel (MIP)1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 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/active-maxRead 14 October 2026Display Size 1.5 in, AMOLED.

1.3in(3.3 cm)1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: 1.3 inch (33 mm) diameter.

Resolution

480 × 480px1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

260 × 260px1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: 260 x 260 pixels.

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

323ppi1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Display PPI: 323, as published.

Not available

Display area

Not available

Not available

Touchscreen

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026The manual describes control only with the LIGHT, UP, DOWN, BACK and START/STOP buttons and never mentions touch input.

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/active-maxRead 14 October 2026Peak up to 3,000 nits. Footnote 4: 3,000 nit brightness is not supported below 30% battery. With automatic brightness enabled the watch can reach up to 2,000 nits in some environments. Peak claim, not a measurement.

Not available

Minimum brightness

Not available

Not available

Always-on display

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Technical Specifications > Battery lists AoD mode battery life of up to 10 days.5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026Always On Display: enable the AOD in Settings > Display. Standby screen keeps time and some watch face information.

Not available

Display cover

Other glass1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Gorilla Glass1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Display cover (as published)

Strengthened glass with anti-fingerprint coating1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Touchscreen: strengthened glass plus anti-fingerprint coating. Not sapphire.

Corning Gorilla Glass 31Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Lens material Corning Gorilla Glass 3. Bezel material is fiber-reinforced polymer. Case material is not listed, so case_material is not stored.

Platform

4 of 15 differ

Platform

Proprietary1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Zepp OS is Amazfit's own watch software. The Software Updates section names Zepp OS 6.

Proprietary1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin watch software with downloadable Connect IQ watch faces, data fields and apps.

OS at launch

Zepp OS 56Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Operating system at launch: Zepp OS 5.

Not available

Software

Zepp OS1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Not available

Latest OS

Zepp OS 61Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Software Updates, August 2026 OTA 4: upgraded to Zepp OS 6. The os.zepp.com Zepp OS 6 list also names Active Max.10Maker product pageos.zepp.com/compatibility-zepp-os-6Read 14 October 2026Current maker compatibility list names Amazfit Active Max for Zepp OS 6. This is the current major version, not a patch version. Feature availability varies by watch.

Not available

Works with

iOS, Android1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Supported Devices: Android 7.0 and above, iOS 14.0 and above. Requires the Zepp App. The user manual says iOS 14.0 and the reseller-hosted product manual says iOS 15.0, so no phone requirement text is stored.

iOS, Android1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Phone requirement

Not available

Not available

App store

Yes9Spec databasethe5krunner.com/specs/amazfit/active-maxRead 14 October 2026App ecosystem row: Zepp OS third-party mini-app store.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Connect IQ downloadable watch faces, data fields and apps and an on-device Connect IQ store.

Voice assistants

Zepp Flow1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Zepp Flow, select countries and regions. English, French, German, Italian, Spanish, Japanese, Korean and Portuguese.

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

0 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.

4GB1Maker product pageus.amazfit.com/products/active-maxRead 14 October 20264GB storage, nominal.

4GB1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Memory/History 4 GB. The manual lists up to 4 GB of music storage for Music models only.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Music storage up to 4 GB applies to Music models.

Health sensors

2 of 8 differ

Heart rate sensor

BioTracker PPG biometric sensor (5 photodiodes and 2 LEDs)1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Sensors > Health: BioTracker PPG biometric sensor (5PD + 2LED).

Garmin Elevate wrist heart rate monitor1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

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

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Electrical heart rate: No. ECG: No. The maker sensor list has only the PPG sensor.

No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: electrical heart rate No, ECG No. The Garmin product page lists no ECG sensor or app.

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

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Blood-oxygen saturation 24-hour and manual measurement. Not a medical device.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Pulse Ox blood oxygen, spot-check and optional all-day acclimation and in sleep. Not available in all countries.

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

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 202624H Monitoring lists skin temperature (thermometer).

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026The manual describes an internal temperature sensor whose reading is affected by body temperature and offers an external tempe sensor for ambient temperature. No skin temperature function is described.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: skin temperature No. The Garmin page lists only a thermometer.

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

Not available

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

1 of 9 differ

Accelerometer

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Barometric altimeter

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 20265Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026Control center supported features include Barometer.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Compass

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026The user manual Control Center lists Compass and Barometer. The spec table lists a geomagnetic sensor.5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026Control center supported features include Barometer and Compass.8Reviewlivescience.com/health/exercise/amazfit-active-max-smartwatch-reviewRead 14 October 2026Review lists single-band GPS, compass and altimeter.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: ambient light sensor No. The Garmin sensor list has none.

Depth gauge

Not available

Not available

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

Not available

Not available

Water temperature sensor

Not available

Not available

Health and fitness

3 of 5 differ

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

Heart rate alerts, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score, Cycle tracking1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Heart rate, SpO2 and stress monitoring, abnormal high and low heart-rate alerts and low SpO2 alerts, sleep stages including REM, sleep HRV, sleep score, BioCharge/HybridCharge energy score and menstrual cycle tracking. Heart-rate sampling can be set to 1 minute at the lowest, so continuous heart rate is not claimed. No ECG, sleep apnea or hypertension features.

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/780139/pn/010-02641-01Read 11 October 2026Specs list heart rate every second, high and low abnormal heart rate alerts, Pulse Ox, HRV status, advanced sleep, all-day stress and women's health in Garmin Connect. Sleep stages are in the manual.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Sleep statistics include total hours of sleep, sleep stages and sleep score (page 42 area).

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, Ski resort maps1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Smart recognition of 8 sports and 25 strength movements, VO2 max, training load, recovery time, rep, set and rest detection, interval training on the watch, pool and open water swimming modes, offline maps with turn-by-turn directions and imported-route navigation. VO2 max and real-time performance scores work in running modes only. 170+ sports modes is not an exact count.

VO2 max, Training load, Recovery advice, Running dynamics, Running power, Pool swim, Open water swim, Strength rep counting, Interval workouts, Route navigation, Trackback1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list VO2 Max (run), training load, recovery time, running dynamics, running power, pool and open-water swim metrics, automatic rep counting, interval training, course guidance and TracBack. Running dynamics need a pod or HRM-Pro. No golf course or ClimbPro entry.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Page 62: running power can be measured with a compatible running dynamics accessory or the watch sensors. Page 63: Running Dynamics Pod records running dynamics.

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

Not available

Not available

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

Not available

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 cadence1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Connection to Peripheral Workout Devices: heart rate belt, running and cycling power meters, cycling speedometer and cadence meter. Footnote 13: Bluetooth LE devices only.

Heart rate strap, Power meter, Speed and cadence, Foot pod, Smart trainer1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list heart rate from external HRM, power meter compatible, speed and cadence sensor support, foot pod capable and smart trainer control.

Safety

3 of 6 differ

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

No7Reviewtomsguide.com/wellness/smartwatches/amazfit-active-max-review-a-high-end-garmin-dupe-for-the-price-of-an-entry-level-smartwatchRead 14 October 2026You won't find fall or crash detection.

No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list only incident detection during select activities, which is limited to certain outdoor activities. Not counted as general fall detection.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Page 83: incident detection is a supplemental feature available only for certain outdoor activities.

Car crash detection

No7Reviewtomsguide.com/wellness/smartwatches/amazfit-active-max-review-a-high-end-garmin-dupe-for-the-price-of-an-entry-level-smartwatchRead 14 October 2026You won't find fall or crash detection.

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.

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Emergency SOS: No. Satellite SOS: No. Fall detection: No.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Assistance. The manual says it sends a message with name, LiveTrack link and GPS location to emergency contacts through a paired phone with data. It does not call emergency services.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Safety and Tracking, page 84: Assistance sends a message with name, LiveTrack link and GPS location to emergency contacts. Paired phone with data plan required.

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/780139/pn/010-02641-01Read 11 October 2026Specs list live event sharing (Android only). The manual lists LiveTrack.2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Safety and Tracking: LiveTrack lets friends and family follow activities in real time.

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

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026LED flashlight: No. The control center flashlight lights the display, which is not a dedicated LED.

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Controls menu: Flashlight turns on the screen to use the watch as a flashlight. A lit display is not a dedicated LED.7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: LED flashlight No, matching the manual.

Positioning

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

GPS, GLONASS, Galileo, QZSS, BeiDou6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Sensors list GPS, Galileo, GLONASS, QZSS and BeiDou. The maker page says five satellite systems without naming them. Frequency bands are not given.

GPS, GLONASS, Galileo, QZSS, BeiDou1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list GPS, GLONASS, Galileo, QZSS and BeiDou. Multi-band GPS is listed. Signal bands are not named.

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

No7Reviewtomsguide.com/wellness/smartwatches/amazfit-active-max-review-a-high-end-garmin-dupe-for-the-price-of-an-entry-level-smartwatchRead 14 October 2026The onboard GPS antenna is a single-band affair.8Reviewlivescience.com/health/exercise/amazfit-active-max-smartwatch-reviewRead 14 October 2026Review calls the GPS single-band. Its unit lists Zepp Pay NFC, so it may be the EMEA edition.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Multi-band GPS. Battery table calls it All-Systems GNSS plus Multi-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/active-maxRead 14 October 2026Free downloadable maps, with OSM import. Footnote 2: the downloaded map must match the real location and a route file must be imported for navigation. Maps include ski resorts.

No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026No map entry in the specs. Only breadcrumb trail, courses and TracBack are listed, which are not offline maps.

Connectivity

6 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/active-maxRead 14 October 2026Connection: Bluetooth, BLE 5.3.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Bluetooth version

5.31Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Connection: Bluetooth, BLE 5.3.4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026Basic Parameters: Bluetooth version V5.3, 2400-2483.5 MHz, output power under 13 dBm.

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.

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Wi-Fi: No. The maker spec table lists no Wi-Fi.

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Status icons: Wi-Fi technology status for Forerunner music watches only. The spec table lists no Wi-Fi for this model.

Wi-Fi standard

Not available

Not available

Wi-Fi bands

Not available

Not available

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

No6Spec databasegadgetsandwearables.com/technical-specs/amazfit-active-maxRead 14 October 2026Cellular: No.7Reviewtomsguide.com/wellness/smartwatches/amazfit-active-max-review-a-high-end-garmin-dupe-for-the-price-of-an-entry-level-smartwatchRead 14 October 2026Spec table: cellular support No.

No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list Connectivity as Bluetooth and ANT+ only. No Wi-Fi and no cellular.

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.

Not available

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin Pay contactless payments are listed. NFC itself is not named in the specs.

Contactless payments

Not available

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Garmin Pay is listed.

Payment services

Not available

Garmin Pay1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Ultra-wideband

Not available

No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: UWB No. Garmin lists Bluetooth and ANT+ only.

Satellite

Not available

Not available

ANT+

No1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Footnote 13: peripheral devices connect over Bluetooth LE only. No ANT+ is listed.

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

Audio

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Speaker

Yes1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Speaker and Mic: Support.

No7Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: speakers No. Garmin lists no voice calls, speaker or music playback for this non-music model.

Microphones

Not available

07Spec databasegadgetsandwearables.com/technical-specs/garmin-forerunner-255Read 11 October 2026Spec table: microphone No. Garmin lists no voice calls or microphone for this model.

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/active-maxRead 14 October 2026FAQ: Bluetooth phone calls and texts through the paired phone. No cellular model.

None1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs list text response and reject phone call with text only. No voice call, speaker or microphone entry and no cellular. No voice calls on the watch.

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/active-maxRead 14 October 20264GB for up to 100 hours of podcast playback. Continuous GPS usage with music: up to 22 hours. Footnote 1 says podcast support arrives by software update. The FAQ says third-party music apps cannot be installed.7Reviewtomsguide.com/wellness/smartwatches/amazfit-active-max-review-a-high-end-garmin-dupe-for-the-price-of-an-entry-level-smartwatchRead 14 October 20264GB of onboard storage for saving up to 100 hours of music or podcasts.

No2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Specifications page 101 lists music media storage for Forerunner music watches (Forerunner 255 Music). This model is the non-music watch.

Controls

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

21Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Technical Specifications > Buttons: 2.

52Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview, page 2: LIGHT, UP, DOWN, BACK and START/STOP.

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

Up button, Down button4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026About the Watch: Up button and Down button. Strap-lug screws are not operating buttons.

LIGHT, UP, DOWN, BACK, START/STOP2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview page 2. START and STOP share one button.

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_active_max/files/user-manual.pdf.pdfRead 14 October 2026Basic operations show touch gestures, an upper button and a lower button. No rotating crown.

None2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview shows five buttons and no crown.

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

None5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026No rotating bezel in the manual. Tom's Guide calls the tachymeter bezel faux and flush with the glass, so it is decorative.

None2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Overview shows five buttons and no rotating bezel.

Gestures

Cover the screen to turn it off5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026Basic operations, page 2: cover the screen to turn it off.

Raise and turn your arm to turn on the backlight2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Backlight settings: Gesture turns on the backlight by raising and turning your arm to look at your wrist.

Battery and charging

8 of 13 differ

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

658mAh1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026658 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 Active Max

Mode	With solar	Hours (h)
Smartwatch	No	600
Heavy use	No	312
Always-on	No	240
GPS	No	64
GPS with music	No	22

Source1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Up to values. Typical 25 days: static watch face, voice assistant off, heart rate every 5 minutes, 8 hours a day sleep and breathing monitoring, 15 minutes a week calls, 30 minutes a week music and three 30-minute GPS runs a week. Heavy 13 days: dynamic watch face, voice assistant on, heart rate every minute, 30 minutes a week calls, 60 minutes a week music and the same GPS runs. AoD mode 10 days has no stated conditions beyond that. Continuous GPS 64 h. GPS with music 22 h.

BGarmin Forerunner 255

Mode	With solar	Hours (h)
Smartwatch	No	336
GPS	No	30
GPS, all systems	No	25
GPS, dual-band	No	16

Source1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Smartwatch mode up to 14 days (336 h). GPS-only GNSS up to 30 h. All-Systems GNSS up to 25 h. All-Systems plus Multi-Band up to 16 h. Manual footnote: smartwatch mode includes activity tracking, phone notifications and wrist heart rate.

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.

600h=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.

64h=CalculatedFrom Claimed battery life

30h=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.

Not available

No9Reviewdcrainmaker.com/2022/06/garmin-forerunner-multisport.htmlRead 11 October 2026Review covers the Forerunner 255, 255S, 255 Music and 255S Music with no solar model. Solar is introduced in this launch only on the Forerunner 955 Solar.

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.

Magnetic pins4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026Charging the Watch: the metal contacts on the back of the watch fit the charging base. The page calls it a magnetic charging head. Conductive pins, not Qi.

Proprietary plug1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Garmin proprietary plug charger.

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

Input DC 5 V, 500 mA max. The product manual recommends a power adapter with a charging current of 1 A or more. The USB-C cable is not included.4Owner's manualteamplush.by/wp-content/uploads/2026/03/ebee4a37f9738b85defbef6b93194aef44753e63015757d5d56ccbd7659e6d1e_optim_cropped.pdfRead 14 October 2026Basic Parameters: Input DC 5 V 500 mA MAX. Charging the Watch note 2 recommends a power adapter with 1 A or more. The US page says the USB-C cable is not included.

Not available

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.

120min9Spec databasethe5krunner.com/specs/amazfit/active-maxRead 14 October 2026Charging row: approximately 2 hours for a full charge. Approximate, charger not stated. The page lists NFC for EMEA only and no ANT+.

120min2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Tips for charging: charging a fully depleted battery takes up to two hours, from a Garmin approved AC adapter or a computer USB port. Stored as a nominal claim of 120 minutes with the up-to qualifier.

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

3 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.

22mm1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Strap Attachment 22mm in the model comparison and Strap Width: 22mm in the specs.

22mm1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: quick release bands, 22 mm, industry standard.

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

Not available

Yes1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

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

22 mm strap attachment1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Compare table: Strap Attachment 22mm. The product manual shows spring-bar strap attachment. The lug screws are not strap-release controls.

Industry standard 22 mm quick release bands1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026

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/active-maxRead 14 October 2026Strap Materials: Silicone. Classic pin buckle.

Silicone1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: Strap material silicone.

Strap

Not available

Not available

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 Active Max

Not available

BGarmin Forerunner 255

Wrist (min) (mm)	Wrist (max) (mm)
130	205

Source1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Specs: fits wrists with a circumference of 130-205 mm. This is the overall range for the watch with its supplied silicone strap.

Regulatory

1 of 3 differ

FCC ID

Not available

Not available

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

ANT+ certified2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 October 2026Front matter: this product is ANT+ certified.

In the box

1 of 2 differ

In the box

Smartwatch (including standard strap), Magnetic charging head (no cable), Instruction manual1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026Packing List. The page notes the USB-C charging cable is not included.

Forerunner 255, Charge/data cable, Documentation1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026In the Box tab: Forerunner 255, charge/data cable, documentation.

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/active-maxRead 14 October 2026Packing list has the magnetic charging head but no mains or USB power adapter.

No1Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026Box lists a charge/data cable and no power adapter.

Links

Not compared

Product page

us.amazfit.com/products/active-max1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

www.garmin.com/en-US/p/780139/pn/010-02641-011Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026US store page for SKU 010-02641-01.

Spec sheet

us.amazfit.com/products/active-max1Maker product pageus.amazfit.com/products/active-maxRead 14 October 2026

www.garmin.com/en-US/p/780139/pn/010-02641-011Maker product pagegarmin.com/en-US/p/780139/pn/010-02641-01Read 11 October 2026The specs tab of the US product page holds the full specification list for the 46 mm watch.

Manual

support.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdf5Owner's manualsupport.amazfit.com/en/amazfit_active_max/files/user-manual.pdf.pdfRead 14 October 2026

www8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdf2Owner's manualwww8.garmin.com/manuals/webhelp/GUID-676967A0-1B23-4384-9BC9-76F3D643F1C8/EN-US/Forerunner_255_OM_EN-US.pdfRead 11 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

0 of 1 differ

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/active-maxRead 14 October 2026US store page lists 1 Year Warranty. The product manual states a 12-month manufacturing-defect warranty or the period required by local consumer law. US market only.

1year5Maker product pagegarmin.com/en-US/legal/consumer-limited-warrantyRead 11 October 2026Garmin consumer limited warranty, US: non-aviation products are free from defects in materials or workmanship for one year from the date of purchase.

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