HUAWEI WATCH GT 7 46 mm / Amazfit T-Rex 3 (48 mm)

HUAWEI WATCH GT 7 46 mm: TUM-B39 · 46 mm · black EasyCross fluoroelastomer strap; not the Pro or 41 mm version.

Amazfit T-Rex 3 (48 mm): 48.5 mm case, 1.5-inch AMOLED; Onyx (black), Lava and Gray colours. The T-Rex 3 Pro, T-Rex 2 and the T-Rex Ultra 2 are separate models.

SpecificationHUAWEI WATCH GT 7 46 mmAmazfit T-Rex 3 (48 mm)
Release year20262024
Model codeTUM-B39 Huawei—
Case46 × 46 × 10.95 mm; stainless steel Huawei—
WeightApproximately 51.3 g without strap Huawei68.3 g (without strap) Amazfit
Wrist range140–210 mm Huawei—
Display1.47-inch AMOLED; 466 × 466; 317 ppi Huawei1.5-inch AMOLED, 480 × 480 pixels, 322 ppi; Gorilla Glass touchscreen

There is also a night display mode.

Amazfit
Peak brightness3000 nits at 30% APL laboratory conditions

Not sustained full-screen brightness.

Huawei		—
ControlsRotating/pressable crown; side button Huawei—
Bluetooth6.0; BR + BLE, 2.4 GHz Huawei—
PositioningGPS L1/L5; Galileo E1/E5a; BeiDou B1I/B1C/B2a; GLONASS, QZSS, NavIC Huawei—
Phone compatibilityAndroid 9 or iOS 13 and later Huawei—
SensorsAccelerometer, gyroscope, magnetometer, optical heart rate, barometer, temperature and ambient light HuaweiBioTracker 6.0 PPG biometric sensor; accelerometer, gyroscope, magnetometer, barometric altimeter, ambient light, temperature sensor

The watch offers an altitude assistant, storm alerts, compass, sunrise/sunset and tide information, and prompts for blood-oxygen readings at high altitude.

Amazfit
CallsSpeaker and microphone; Bluetooth connection to paired phone Huawei—
Battery modesUp to 21 days light use, 12 typical, 7 with AOD Huawei—
Trail runningUp to 51 hours under manufacturer test conditions Huawei—
ChargingWireless cradle; adapter requirement up to 5–10 V DC/2 A Huawei—
Water protection5 ATM and IP69; not approval for diving or hot showers.

Water resistance is not permanent; leather and woven straps have different limitations.

Huawei		—
Operating temperature-20 to +45 °C Huawei—
NFCHardware supported; payments depend on country, bank and phone compatibility. Huawei—
Case and strap—48.5 × 48.5 × 13.75 mm; stainless-steel bezel, polymer middle frame; 4 buttons; 22 mm liquid-silicone strap for 145–210 mm wrists

The 22 mm strap is a standard width and can be swapped.

Amazfit
Water and diving—10 ATM; freediving to 45 metres (147 ft) certified to EN 13319, ISO 6425 and GB/T 18828

10 ATM means withstanding the pressure of 100 metres of still water for up to 10 minutes. Breath-hold training and testing are downloaded through the Zepp app.

Amazfit
Battery—700 mAh; 27 days typical, 13 days heavy use, 40 days battery saver, 81 days clock mode; 42 hours in accuracy GPS mode, 72 hours power-saving GPS, 180 hours maximum GPS mode

A full charge takes about 3 hours; a magnetic charging base is in the box but no USB-C cable. Low-temperature mode gives 28 hours with GPS on and 32 days with it off. The maximum GPS mode works only in hiking and climbing modes.

Amazfit
Positioning and navigation—Dual-band and single-band modes; 6 satellite systems; offline maps, turn-by-turn directions, route import, back-to-start and off-route alerts

Dual-band positioning receives two frequencies from the satellites to reduce drift from reflected signals among tall buildings and dense trees; it uses more battery. Automatic mode switches settings based on signal strength.

Amazfit
Connectivity—Bluetooth 5.2 (BLE), 2.4 GHz Wi-Fi; microphone; music storage

Wi-Fi is used to download software updates without the phone. The watch shows incoming calls but cannot take Bluetooth calls; quick reply works on Android only.

Amazfit
Sports and health—170+ sports modes (177 listed); recognition of 25 strength and 8 sports movements; 24-hour heart rate, blood oxygen and stress; sleep stages; PAI; Zepp Coach

Chest straps, running/cycling power meters and cycling speed/cadence sensors can be paired; data can be exported to apps such as Strava, komoot and Apple Health.

Amazfit
Compatibility—Android 7.0 and later, iOS 14.0 and later; Zepp app Amazfit