Smartwatches / Compare

Amazfit Balance 2 vs COROS PACE 4 Pro

A

Product A: Amazfit

Balance 2

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B

Product B: COROS

PACE 4 Pro

90 of 150 known

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Only differences

AAmazfit Balance 2

BCOROS PACE 4 Pro

General

6 of 10 differ

Series

Balance1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Listed in the Balance product line

PACE1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026The page is the COROS PACE 4 Pro product. COROS names the PACE line.

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

W2430GL1N, BA2BK-C1202005011, A2429, A24307Owner's manualsupport.amazfit.com/en/amazfit_balance_2/imgs/electronic_manual.pdfRead 30 September 2026Basic Parameters, page 6, names regulatory model A2429/A2430. Existing regional store identifiers are retained.

WPACE4P-BLK-N, WPACE4P-BLK, WPACE4P-WHT, W3373Maker product pageshop.coros.com/products/coros-pace-4-proRead 14 October 2026COROS store product JSON lists three SKUs: WPACE4P-BLK-N, WPACE4P-BLK and WPACE4P-WHT. W337 is the regulatory model from the FCC filing.12Regulatory filingfccid.co/fcc/2BBGF-W337Read 14 October 2026The filing identifies the hardware model as W337.

GTIN / EAN

850071618297, 69725961089481Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Store barcode 850071618297 (US variant)2Maker product pagede.amazfit.com/products/balance-2Read 30 September 2026Store barcode 6972596108948 (EU variant)

810005786874, 810005786676, 8100057866833Maker product pageshop.coros.com/products/coros-pace-4-proRead 14 October 2026Variant barcodes: WPACE4P-BLK-N 810005786874, WPACE4P-BLK 810005786676, WPACE4P-WHT 810005786683.

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

24 June 20258Press releasezepp.com/press-release/amazfit-introduces-balance-2-smartwatch-and-helio-strap-for-smarter-training-better-recovery-and-peak-performanceRead 30 September 2026Availability and Pricing: global launch June 24, 2025, USD 299.99 and EUR 299.9.

22 September 202614Reviewtomsguide.com/wellness/smartwatches/coros-pace-4-pro-reviewRead 14 October 2026The review says the PACE 4 Pro launched on 22 September 2026.

Status

Available1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Available3Maker product pageshop.coros.com/products/coros-pace-4-proRead 14 October 2026All three variants are marked available on the US store. The product was published on 2026-09-22.

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

Amazfit Balance9Reviewnotebookcheck.net/New-Amazfit-Balance-2-smartwatch-launches-with-longer-battery-life.1015909.0.htmlRead 23 October 2026Notebookcheck says the Amazfit Balance 2 builds on the original Amazfit Balance from 2023 and compares it with its predecessor.

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.

Amazfit Balance 310Reviewnotebookcheck.net/Amazfit-Balance-Ultra-flagship-smartwatch-launches-with-titanium-case-and-30-day-battery-life.1313695.0.htmlRead 23 October 2026Notebookcheck says Amazfit unveiled the Balance 3 and the Balance Ultra as two successors to the Balance 2.

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.

$299.998Press releasezepp.com/press-release/amazfit-introduces-balance-2-smartwatch-and-helio-strap-for-smarter-training-better-recovery-and-peak-performanceRead 30 September 2026Availability and Pricing: global launch June 24, 2025, USD 299.99 and EUR 299.9.

$4493Maker product pageshop.coros.com/products/coros-pace-4-proRead 14 October 2026List price 449.00 USD on the US store for all three variants. US sales tax is not included.

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.

€299.98Press releasezepp.com/press-release/amazfit-introduces-balance-2-smartwatch-and-helio-strap-for-smarter-training-better-recovery-and-peak-performanceRead 30 September 2026Availability and Pricing: global launch June 24, 2025, USD 299.99 and EUR 299.9.

€4494Maker product pagecoros.com/de/buy/pace4proRead 14 October 2026COROS Germany store lists 449.00 EUR for all three variants. EUR prices include VAT. This is the current list price three weeks after launch. BikeRadar's launch report gives the same 449 EUR.16Press articlebikeradar.com/news/coros-pace-4-pro-smartwatchRead 14 October 2026Launch report: 389 GBP / 449 USD / 449 EUR.

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

US, EU1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026US store and EU store (de.amazfit.com) sell it

US, DE3Maker product pageshop.coros.com/products/coros-pace-4-proRead 14 October 2026US store page. The German store page is the other source.

ColoursiThe maker's own colour names

Black1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Black / Nylon, Black / Silicone, White / Silicone3Maker product pageshop.coros.com/products/coros-pace-4-proRead 14 October 2026Option names on the store, verbatim: Black / Silicone, White / Silicone, Black / Nylon.

Segment

Sport1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Marketed as a premium multisport training partner

Sport2Maker product pagecoros.com/pace4proRead 14 October 2026COROS calls it a GPS sport watch and a multisport watch with dedicated run, bike, swim, triathlon and multi-sport modes.

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.

47mm4Retailer pageamazon.com/Amazfit-Balance-Sapphire-Display-Offline-Battery/dp/B0F9JFCYNXRead 30 September 2026Title: 47mm

47.6mm1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026COROS publishes no marketed case size. 47.6 mm is the stated length and width of the case.

Case shape

Round3Reviewtechradar.com/health-fitness/smartwatches/amazfit-balance-2-reviewRead 30 September 2026Classic circular watch design

Round1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026The display is round and the case outline in the maker product images 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/balance-2Read 30 September 2026Technical Specifications > Design lists Frame: Aluminum alloy and Case: Fiber-reinforced polymer. Mixed follows the published frame and case materials.

Fibre-reinforced polymer1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Materials: cover material Fiber Reinforced Polymer, bezel material Grade 5 Titanium Alloy. The overview and store copy also say TC4 titanium alloy, which is the same alloy as Grade 5. T3 and the5krunner describe a polymer body with a titanium bezel, so the housing is not classed as titanium.15Reviewt3.com/active/fitness-trackers/coros-pace-4-pro-reviewRead 14 October 2026The polymer case body feels a bit plasticky next to the titanium bezel and sapphire glass. This agrees with the maker's cover material and bezel material.

Case material (as published)

Frame: Aluminum alloy, Case: Fiber-reinforced polymer1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Fiber Reinforced Polymer cover with Grade 5 Titanium Alloy bezel1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Materials > Cover Material and Bezel Material.

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.

Height47.4Width47.4Thickness12.3mm(1.9 × 1.9 × 0.5 in)1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Without heart rate base

Height47.6Width47.6Thickness11.8mm(1.9 × 1.9 × 0.5 in)1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Size and Weight > Dimensions 47.6 x 47.6 x 11.8 mm. Height does not include the optical heart rate sensor. The overview calls 11.8 mm the width, but the spec table and reviews treat it as thickness.

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

43g(1.5 oz)1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Without strap

38g(1.3 oz)1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026The overview comparison lists body weight 38 g for the PACE 4 Pro. The German page calls it Gehäusegewicht.2Maker product pagecoros.com/pace4proRead 14 October 2026PACE 4 Pro body weight 38 g in the comparison.

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

43g(1.5 oz)1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Size and Weight: 43 g with nylon band, 51 g with silicone band. The base value is the nylon band. The silicone rows are in the variants.

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/balance-2Read 30 September 2026

5ATM1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Durability > Water Resistance 5 ATM, suitable for surface water activities and not for diving.

Water resistance standard

ISO 22810:20101Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Durability footnote 6.

Not available

Dust and water rating

Not available

Not available

Dive rating

EN13319:20001Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Durability footnote 6 gives EN13319:2000 and report SZES250400322101.

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/balance-2Read 30 September 2026FAQ: certified for diving, depths up to 45 meters, freediving and recreational scuba

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°C7Owner's manualsupport.amazfit.com/en/amazfit_balance_2/imgs/electronic_manual.pdfRead 30 September 2026Basic Parameters, printed page 6.

Min-20Max50°C1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Durability > Working Temperature -20 to 50 C. Storage -20 to 60 C is a separate range.

Display

10 of 14 differ

Display type

OLED1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

LTPO OLED1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026

Display type (as published)

AMOLED1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

LTPO AMOLED Display1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Display > Display Type LTPO AMOLED Display.

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/balance-2Read 30 September 2026

1.47in(3.7 cm)1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Display > Display Size 1.47 inches.

Resolution

480 × 480px1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

466 × 466px1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026

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

323ppi1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Not available

Display area

Not available

Not available

Touchscreen

Yes1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Spec row Touchscreen: Sapphire glass

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Display copy says 1.47 inch touchscreen display, and the setup guide has Touchscreen settings.

Max refresh rateiHighest published display refresh rate in active operation.

Not available

60Hz2Maker product pagecoros.com/pace4proRead 14 October 2026The adaptive refresh rate moves from 60Hz to 1Hz LTPO.

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

Not available

1Hz2Maker product pagecoros.com/pace4proRead 14 October 2026The same text gives 1Hz as the lowest rate. It is the LTPO idle rate.

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.

2,000nits1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Up to 2,000 nits with automatic brightness, not below 30% battery

3,500nits2Maker product pagecoros.com/pace4proRead 14 October 2026Maker claim of a 3,500 nit AMOLED display. Auto-Brightness is described as from 3,500 nits at noon to 2 nits at 2AM. Window size and test conditions are not stated, so it is a claim and not a measurement.

Minimum brightness

Not available

2nits2Maker product pagecoros.com/pace4proRead 14 October 2026Auto-Brightness range ends at 2 nits at 2AM.

Always-on display

Yes6Owner's manualsupport.amazfit.com/en/amazfit_balance_2/files/user-manual.pdf.pdfRead 30 September 2026Always On Display section, printed page 5.

Yes5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Display > Always On keeps the screen illuminated and dims it when the wrist is lowered.

Display cover

Sapphire1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Sapphire1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026

Display cover (as published)

Sapphire glass1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Sapphire Glass1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Materials > Screen Material Sapphire Glass.

Platform

6 of 15 differ

Platform

Proprietary1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Zepp OS

Proprietary8Maker product pagesupport.coros.com/hc/en-us/articles/53824831742100-COROS-PACE-4-Pro-Release-NotesRead 14 October 2026COROS publishes its own firmware versions through the COROS app and Wi-Fi updates. Tom's Guide says there is no app store. No Wear OS, watchOS or HarmonyOS.

OS at launch

Zepp OS 53Reviewtechradar.com/health-fitness/smartwatches/amazfit-balance-2-reviewRead 30 September 2026Performance section identifies Zepp OS 5 before the later Zepp OS 6 update.

Not available

Software

Not available

Not available

Latest OS

Zepp OS 61Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026OTA 10, August 2026

V3.2008.08Maker product pagesupport.coros.com/hc/en-us/articles/53824831742100-COROS-PACE-4-Pro-Release-NotesRead 14 October 2026Latest published PACE 4 Pro firmware V3.2008.0, September 26 2026. The FCC test sample ran software V3.1706.0, which is not an OS-at-launch claim.

Works with

Android, iOS1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

iOS, Android5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Download the COROS app from the iOS or Google Play store.

Phone requirement

Android 7.0 and above, iOS 15.0 and above1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Not available

App store

Yes6Owner's manualsupport.amazfit.com/en/amazfit_balance_2/files/user-manual.pdf.pdfRead 30 September 2026Installing and Uninstalling Apps, page 51: download more apps from the app store.

No14Reviewtomsguide.com/wellness/smartwatches/coros-pace-4-pro-reviewRead 14 October 2026The smart features section says there is no app store. Syncing data to Strava or TrainingPeaks does not install third-party apps on the watch.

Voice assistants

Zepp Flow1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Voice Control5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Holding the Action button launches Voice Control for commands such as start a run or create a reminder. The list names the watch's own voice commands, not a third-party assistant.

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

64 MB16Press articlebikeradar.com/news/coros-pace-4-pro-smartwatchRead 14 October 2026Relays COROS: double the RAM size of the PACE 4 at 64MB. The same sentence says 64GB storage, which conflicts with the maker's 32GB spec and is not used. Stored as 0.064 GB, 64 MB at 1000 MB per GB.17Retailer pageplaybetter.com/products/coros-pace-4-pro-multisport-gps-smartwatchRead 14 October 2026Spec list reads RAM 64MB (2x PACE 4), in agreement with BikeRadar.

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.

32GB4Retailer pageamazon.com/Amazfit-Balance-Sapphire-Display-Offline-Battery/dp/B0F9JFCYNXRead 30 September 2026Title: 32GB Storage

32GB1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Memory > Internal Memory 32GB, shared by music and maps. The support article Playing Music from Your COROS Watch still says 4GB for the PACE 4 Pro, which looks like an unchanged line from the PACE 4. The spec table, the buy page and reviews say 32GB.

Health sensors

6 of 8 differ

Heart rate sensor

BioTracker 6.0 PPG biometric sensor (5PD + 2LED)1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Some third-party pages say 8PD + 2LED. The maker page says 5PD + 2LED

Optical heart rate monitor, multi-channel PPG1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Data Tracking lists an Optical Heart Rate Monitor, and the overview says the latest multi-channel PPG sensor. Tattoos may affect readings.

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

No5Spec databasegadgetsandwearables.com/technical-specs/amazfit-balance-2Read 30 September 2026Health/sensor or Navigation, safety & special features row explicitly says No. Other inconsistent database rows are not used.

Not available

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

Yes1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Data Tracking lists an Optical Pulse Oximeter.5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Sensor list: Pulse oximetry sensor (new SpO2 sensor).

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

Yes6Owner's manualsupport.amazfit.com/en/amazfit_balance_2/files/user-manual.pdf.pdfRead 30 September 2026Temperature section, printed page 50: sensor measures skin temperature when worn.

Not available

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

None5Spec databasegadgetsandwearables.com/technical-specs/amazfit-balance-2Read 30 September 2026Health/sensor or Navigation, safety & special features row explicitly says No. Other inconsistent database rows are not used.

Not available

Body composition sensor

No5Spec databasegadgetsandwearables.com/technical-specs/amazfit-balance-2Read 30 September 2026Health/sensor or Navigation, safety & special features row explicitly says No. Other inconsistent database rows are not used.

Not available

Skin conductance (EDA)

No5Spec databasegadgetsandwearables.com/technical-specs/amazfit-balance-2Read 30 September 2026Health/sensor or Navigation, safety & special features row explicitly says No. Other inconsistent database rows are not used.

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

2 of 9 differ

Accelerometer

Yes1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026

Accelerometer range

Not available

Not available

Gyroscope

Yes1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026

Barometric altimeter

Yes1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026

Compass

Yes1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026

Ambient light sensor

Yes1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Not available

Depth gauge

Yes6Owner's manualsupport.amazfit.com/en/amazfit_balance_2/files/user-manual.pdf.pdfRead 30 September 2026Diving sections report real-time depth and depth alarms.

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.

Continuous heart rate, Heart rate alerts, Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Readiness score, Cycle tracking1Maker product pageus.amazfit.com/products/balance-2Read 30 September 202624H heart rate, SpO2 and stress. Abnormally high and low heart rate alerts. Sleep HRV and stages. Readiness score via Zepp Flow. Menstrual cycle tracking

Blood oxygen app, Heart rate variability, Sleep tracking, Sleep stages, Stress tracking, Cycle tracking1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Data Tracking > Daily Features lists Daily Stress, Sleep with REM tracking, HRV and Wellness Check. The setup guide describes sleep stages, overnight HRV, menstrual cycle tracking and the SpO2 oximeter. Resting heart rate is read every 10 minutes in daily use, so continuous heart rate is not stored. Tom's Guide says the watch has no readiness score.5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Sleep and Wellness Features names sleep with a sleep score and stages, overnight HRV and menstrual cycle tracking. Daily Stress is a setting. The Oximeter control takes manual SpO2 readings.

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, Running power, Pool swim, Open water swim, Interval workouts, Route navigation, Turn-by-turn navigation, Golf courses6Owner's manualsupport.amazfit.com/en/amazfit_balance_2/files/user-manual.pdf.pdfRead 30 September 2026Physical indicators pages 27-30 confirm VO2 max, training load and recovery. Maker page confirms routing, swimming, golf and external running-power meter support. Advanced running-dynamics metrics were not found, so that entry is removed.

VO2 max, Training load, Recovery advice, Pool swim, Open water swim, Interval workouts, Route navigation, Turn-by-turn navigation, Trackback1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026EvoLab lists recovery, fatigue, training load and VO2 max. Basic Interval Training is named. Supported Activity Modes list Open Water and Pool Swim. Navigation lists Back-To-Start, and the setup guide describes Turn by Turn and Back to Start retracing your GPS track. Running dynamics need a COROS POD, so they are not stored.5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Navigation Settings include Turn by Turn and Back to Start, which retraces your steps via your GPS track.

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.

Freedive, Scuba, single gas6Owner's manualsupport.amazfit.com/en/amazfit_balance_2/files/user-manual.pdf.pdfRead 30 September 2026Special workout modes > Diving, pages 20-22: freediving and recreational diving with one configured gas (default Air). Quick-start guide page 7 only describes freediving, so the fuller current manual supplies the added scuba mode.

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 pod1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Heart rate belt, running and cycling power meter, cycling speedometer and cadence meter, Stryd footpods

Heart rate strap, Power meter, Speed and cadence, Foot pod1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026The buy page FAQ names heart rate monitors, cycling power meters, cadence sensors, speed sensors and the COROS POD 2 running dynamics pod, all over Bluetooth. No smart-trainer capability is stated.

Safety

3 of 6 differ

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

No5Spec databasegadgetsandwearables.com/technical-specs/amazfit-balance-2Read 30 September 2026Health/sensor or Navigation, safety & special features row explicitly says No. Other inconsistent database rows are not used.

Not available

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.

No5Spec databasegadgetsandwearables.com/technical-specs/amazfit-balance-2Read 30 September 2026Health/sensor or Navigation, safety & special features row explicitly says No. Other inconsistent database rows are not used.

Yes9Maker product pagesupport.coros.com/hc/en-us/articles/25514157012116-Safety-AlertsRead 14 October 2026The PACE 4 Pro spec page lists Safety Alerts under navigation features. This article, last edited 2026-06-23, lists the PACE 4 and PACE Pro but not the PACE 4 Pro, so it is used only for how the feature works. A manual Safety Alert sends location and a live tracking link by text to up to three preset contacts during outdoor activities, and it needs the paired phone with cell service. It does not contact local 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

Yes10Maker product pagesupport.coros.com/hc/en-us/articles/51716258730772-How-to-Use-Live-TrackingRead 14 October 2026Live Tracking works for outdoor activities and needs the phone connected with the COROS app running. The article, last edited 2026-08-14, does not list the PACE 4 Pro. Tom's Guide says the PACE 4 Pro can share a live tracking link, so the value rests on that review plus how the feature works.14Reviewtomsguide.com/wellness/smartwatches/coros-pace-4-pro-reviewRead 14 October 2026During activities you can share a live tracking link and send SOS alerts.

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

No5Spec databasegadgetsandwearables.com/technical-specs/amazfit-balance-2Read 30 September 2026Health/sensor or Navigation, safety & special features row explicitly says No. Other inconsistent database rows are not used.

No5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026The Flashlight tool lights the screen white. It is not a dedicated hardware LED.

Positioning

1 of 3 differ

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

GPS (L1 + L5), GLONASS, Galileo, BDS, QZSS, NavIC3Reviewtechradar.com/health-fitness/smartwatches/amazfit-balance-2-reviewRead 30 September 2026Dual-band (L1 + L5) with support for GPS, GLONASS, Galileo, BDS, QZSS, Navic

GPS, GLONASS, Galileo, BeiDou, QZSS1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Geo Location > Satellite Systems lists GPS, GLONASS, Galileo, Beidou and QZSS. Signal bands per system are not listed.

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

Yes1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Geo Location > GNSS Chipset reads All-Satellite Dual-Frequency.2Maker product pagecoros.com/pace4proRead 14 October 2026Overview: dual-frequency GPS.

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/balance-2Read 30 September 2026

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Navigation lists downloadable Landscape and Topo global maps, and 32GB holds them.

Connectivity

8 of 15 differ

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

Not available

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Connectivity lists Bluetooth for accessories and phone. No Bluetooth version is published.

Bluetooth version

5.21Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

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.

Not available

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Connectivity > Data Sync Wi-Fi / COROS App.5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026System > WiFi connects the watch to Wi-Fi to upload activities and download firmware.

Wi-Fi standard

Wi-Fi 47Owner's manualsupport.amazfit.com/en/amazfit_balance_2/imgs/electronic_manual.pdfRead 30 September 2026Basic Parameters, page 6: 2.4 GHz 802.11 b/g/n.

Wi-Fi 613Regulatory filingfccid.co/api/files/s2/fccids/2BBGF-W337/files/c1951110_SAR_Test_Report.pdfRead 14 October 2026Radio specification lists IEEE 802.11b/g/n/ax with 802.11ax HE20, which is Wi-Fi 6.

Wi-Fi bands

2.4 GHz1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

2.4 GHz13Regulatory filingfccid.co/api/files/s2/fccids/2BBGF-W337/files/c1951110_SAR_Test_Report.pdfRead 14 October 2026All Wi-Fi modes are listed at 2412 MHz to 2462 MHz, so 2.4 GHz only.

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

No3Reviewtechradar.com/health-fitness/smartwatches/amazfit-balance-2-reviewRead 30 September 2026Con: No LTE/Cellular option

No13Regulatory filingfccid.co/api/files/s2/fccids/2BBGF-W337/files/c1951110_SAR_Test_Report.pdfRead 14 October 2026The report and the grant list only Bluetooth BR/EDR/LE and 2.4 GHz WLAN transmitters. The COROS connectivity row lists only Bluetooth and Wi-Fi.

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.

Yes2Maker product pagede.amazfit.com/products/balance-2Read 30 September 2026Zepp Pay with NFC. The same text is on the UK store (eu.amazfit.com)

Not available

Contactless payments

Yes2Maker product pagede.amazfit.com/products/balance-2Read 30 September 2026

No14Reviewtomsguide.com/wellness/smartwatches/coros-pace-4-pro-reviewRead 14 October 2026The specs table lists NFC payments: No, and the smart features section says it does not offer NFC payments. NFC hardware is not ruled out, so the NFC field is not stored.

Payment services

Zepp Pay2Maker product pagede.amazfit.com/products/balance-2Read 30 September 2026Zepp Pay via Curve in 31 European countries

Not available

Ultra-wideband

Not available

Not available

Satellite

Not available

None13Regulatory filingfccid.co/api/files/s2/fccids/2BBGF-W337/files/c1951110_SAR_Test_Report.pdfRead 14 October 2026No satellite radio or satellite messaging in the radio list or the COROS connectivity row.

ANT+

No1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Peripheral connection only supports BLE devices

No19Spec databasethe5krunner.com/specs/coros/pace-4-proRead 14 October 2026The5krunner says sensors connect over Bluetooth only. COROS also lists Bluetooth as the accessory connection, and Tom's Guide says external sensors connect via Bluetooth.

Audio

0 of 4 differ

Speaker

Yes1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Data Tracking lists a speaker to take hands-free calls or play activity alerts out loud. The setup guide lists a Drain the Speaker control.5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Sensor list ends with Speaker and Microphone with noise reduction. Volume settings apply to tones and alerts through the speaker.

Microphones

Not available

Not available

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/balance-2Read 30 September 2026

Phone only18Reviewactive.com/running/articles/coros-pace-4-pro-reviewRead 14 October 2026The built-in speaker and microphone enable a talk feature when paired with a phone. The COROS store copy says hands-free calls. The watch has no cellular radio, so calls go through the paired phone.

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

Yes5Spec databasegadgetsandwearables.com/technical-specs/amazfit-balance-2Read 30 September 2026Storage space for on-board music

Yes5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Music: the PACE 4 Pro plays local MP3 files stored on the device.14Reviewtomsguide.com/wellness/smartwatches/coros-pace-4-pro-reviewRead 14 October 2026You can store music on the PACE 4 Pro, but it only supports MP3 files and cannot link to streaming services.

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.

17Owner's manualsupport.amazfit.com/en/amazfit_balance_2/imgs/electronic_manual.pdfRead 30 September 2026About the Watch, page 1: upper rotating button is counted as the crown, lower button as the one other control button.

21Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Design lists Digital Dial, Back Button and Action Button. The dial is a rotating control and is not counted in the two buttons.5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Operating PACE 4 Pro: Digital Dial (top right), Back/Lap Button (bottom right) and Action Button (bottom left).

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

Lower button7Owner's manualsupport.amazfit.com/en/amazfit_balance_2/imgs/electronic_manual.pdfRead 30 September 2026About the Watch, page 1. Crown excluded from this list.

Back/Lap Button, Action Button1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Design: Back Button and Action Button. Setup guide names them Back/Lap Button and Action Button.5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026

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

Rotating7Owner's manualsupport.amazfit.com/en/amazfit_balance_2/imgs/electronic_manual.pdfRead 30 September 2026About the Watch, page 1: rotate the upper button to switch pages.

Rotating1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026The Digital Dial scrolls and presses to confirm. No haptic claim.5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Scroll the dial to move the selection and press to confirm.

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

Not available

Not available

Gestures

Not available

Raise wrist to wake display5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Gesture Backlight turns the backlight on when the watch detects a wrist raise.

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.

658mAh1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

447mAh17Retailer pageplaybetter.com/products/coros-pace-4-pro-multisport-gps-smartwatchRead 14 October 2026PlayBetter spec list reads Battery 447mAh. It is the only source for the capacity. COROS does not publish it and no FCC exhibit or teardown states it. Nominal voltage is not given.

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 Balance 2

Mode	With solar	Hours (h)
Smartwatch	No	504
Heavy use	No	240
GPS, dual-band	No	33
GPS, power saving	No	67

Source1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Battery table and footnote 1: typical use 21 days, heavy use 10 days, accurate dual-frequency all-satellite GPS 33 h, single-frequency power-saving GPS 67 h. Power-saving GPS is the only GPS saving preset the maker lists, so it is stored as GPS power saving. Typical use uses raise-to-wake and 5-minute HR checks. Heavy use uses 1-minute HR, 30 minutes of GPS daily and additional sleep/stress monitoring.

BCOROS PACE 4 Pro

Mode	With solar	Hours (h)
Smartwatch	No	504
Always-on	No	168
GPS, automatic system selection	No	40
GPS, all systems	No	60
GPS, all systems, always-on display	No	45
GPS, all systems with music	No	17
GPS, dual-band	No	40
GPS, dual-band, always-on display	No	30
GPS, dual-band with music	No	15

Source1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Battery > All Systems On 60 h (45 h with Always-On Display, 17 h with offline music playing), Dual Frequency 40 h (30 h with Always-On Display, 15 h with offline music playing), Daily Use 21 days (7 days with Always-On Display). The Battery Specifications article adds Auto 40+ hours (30+ with Always-On Display), which is stored as 40 with the plus sign here. Days are converted to hours exactly. The 17 and 15 hour music rows do not state the display setting. The store FAQ calls the 45 h figure MAX GPS with dual frequency, which conflicts with the spec table and the battery article, so the spec table is followed.6Maker product pagesupport.coros.com/hc/en-us/articles/23476623096980-Battery-SpecificationsRead 14 October 2026PACE 4 Pro table: Auto 40+ hours (30+ with Always On display), All Systems On / High 60 hours (45), Dual Frequency / Max 40 hours (30), daily use with Sleep Tracking + Daily Stress 21 days (7 days with Always On display). Actual consumption can be higher with backlight, navigation, weak signal and accessories. The Auto row has no always-on option in the schema, so only the 40 hour figure is stored.

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.

504h=CalculatedFrom Claimed battery life

504h=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.

Not available

168h=CalculatedFrom Claimed battery life

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

Not available

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

Not available

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 pins7Owner's manualsupport.amazfit.com/en/amazfit_balance_2/imgs/electronic_manual.pdfRead 30 September 2026Charging the Watch, printed page 2: metal contacts on the watch meet the supplied charging base. USB-C attaches to the base, not the watch.

Proprietary plug5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Metal pins on the A2 adapter plug into the charging port on the back of the watch and snap into place. The standard USB-C cable connects to the A2 and not to the watch.7Maker product pagesupport.coros.com/hc/en-us/articles/53639686483988-Charging-Your-PACE-4-ProRead 14 October 2026The adapter pins fit into the charging port on the back of the watch and the adapter takes any standard USB-C cable.

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

Not available

The COROS A2 charging adapter clips onto the watch and takes any standard USB-C cable. COROS asks for an LPS-certified charger and says to use only 5V/1A charging ports with no fast-charge cables or power banks.7Maker product pagesupport.coros.com/hc/en-us/articles/53639686483988-Charging-Your-PACE-4-ProRead 14 October 2026Use an LPS-compliant charger and official accessories. Do not use a battery pack with quick-charge capability. The Maintenance and Support article says to use only 5V/1A charging ports and no fast-charge cables or power banks.

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

Charge time30 minUse time10 h2Maker product pagecoros.com/pace4proRead 14 October 2026The buy page FAQ says 30 minutes of charging returns roughly 10 hours of GPS. The GPS mode is not stated.

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.

120min1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026FAQ: about 2 hours to fully charge from empty. Approximate maker claim.

90min1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Battery > Charging Time About 1.5 hours. The store FAQ says approximately 1.5 hours from 0 to 100% in normal temperature. Stored as 90 minutes, a nominal claim and not a measured test.

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

4 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/balance-2Read 30 September 2026

22mm1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Watch Band > Width 22mm.

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

Yes7Owner's manualsupport.amazfit.com/en/amazfit_balance_2/imgs/electronic_manual.pdfRead 30 September 2026Strap disassembly diagrams and spring-bar instructions, pages 3-4.

Yes1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Watch Band > Installation Type Quick Release.

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

Not available

22 mm quick-release straps1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Watch Band > Width 22mm with Quick Release installation.

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/balance-2Read 30 September 2026

Nylon1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Materials > Band Material Silicone / Nylon. The base is the Black nylon package. The silicone SKUs are variants.

Strap

Not available

Black nylon band1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026The COROS store names the options Black / Nylon, Black / Silicone and White / Silicone.

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 Balance 2

Wrist (min) (mm)	Wrist (max) (mm)
140	210

Source1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

BCOROS PACE 4 Pro

Size	Wrist (min) (mm)	Wrist (max) (mm)
Nylon	135	205

Source1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026Watch Band: nylon 135-205 mm, silicone 140-220 mm.

Regulatory

1 of 3 differ

FCC ID

Not available

2BBGF-W33712Regulatory filingfccid.co/fcc/2BBGF-W337Read 14 October 2026FCC ID 2BBGF-W337, model W337, COROS PACE 4 Pro, grant date Sep 29, 2026. Read on a public mirror of the FCC filing. The grant notes list BLE and 2.4GHz WLAN transmitters only.

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

0.343W/kg13Regulatory filingfccid.co/api/files/s2/fccids/2BBGF-W337/files/c1951110_SAR_Test_Report.pdfRead 14 October 2026FCC SAR test report DDT-RE26070744-2E04, issued 2026-09-21: highest reported extremity (10-g) SAR at 0 mm is 0.343 W/kg for 2.4 GHz Wi-Fi. Bluetooth extremity is 0.033 W/kg. Limit 4.0 W/kg. This is the US regime.

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

Not available

In the box

1 of 2 differ

In the box

Smartwatch (including standard strap and accessory strap), Magnetic charging head (no cable), Instruction manual1Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

COROS PACE 4 Pro GPS Watch, COROS A2 Charging Adapter5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026What's In the Box: COROS PACE 4 Pro GPS Watch and COROS A2 Charging Adapter. The buy page adds that a USB-C charging cable is not included. The strap is not named in the list.

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/balance-2Read 30 September 2026Magnetic charging head only, USB-C cable not included

No5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026The A2 is a watch-side charging adapter. The box has no mains or USB power adapter and no USB-C cable.

Links

Not compared

Product page

us.amazfit.com/products/balance-21Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026

coros.com/pace4pro2Maker product pagecoros.com/pace4proRead 14 October 2026COROS PACE 4 Pro overview page.

Spec sheet

us.amazfit.com/products/balance-21Maker product pageus.amazfit.com/products/balance-2Read 30 September 2026Technical Specifications section.

coros.com/pace4pro/specs1Maker product pagecoros.com/pace4pro/specsRead 14 October 2026

Manual

support.amazfit.com/en/amazfit_balance_2/files/user-manual.pdf.pdf6Owner's manualsupport.amazfit.com/en/amazfit_balance_2/files/user-manual.pdf.pdfRead 30 September 2026Global-version owner manual.

support.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-Pro5Owner's manualsupport.coros.com/hc/en-us/articles/53610991583508-Set-Up-Your-COROS-PACE-4-ProRead 14 October 2026Set Up Your COROS PACE 4 Pro, the model setup and operating guide, last edited 2026-09-20.

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

1 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/balance-2Read 30 September 20261 Year Warranty, US store

2years11Maker product pagesupport.coros.com/hc/en-us/articles/360039803532-COROS-Warranty-PolicyRead 14 October 2026COROS offers a 2-year warranty from the original activation date for watches that contain batteries. Straps, charging cables and non-battery accessories have 6 months. Local consumer law rights may differ. The COROS store metafield also says 2-year.

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