Amazfit T-Rex 3 Pro

Works with: iPhone and Android
Display: AMOLED, 1.5 in
Case sizes: 44 / 48 mm
Battery: 25 days
GPS battery: 3.5 days
Water resistance: 10 ATM
Weight: 52 g
Cellular: No

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Amazfit T-Rex 3 Pro at a glance

Battery

Weeks between charges

Up to 25 days in smartwatch mode. 85 hours with GPS.
GPS

Multi-band GPS

Maps on the wrist. Runs and rides without your phone.
Display

AMOLED, 1.5 in

1.5 in, up to 3,000 nits and touchscreen.
Health

Blood pressure readings

Measures blood pressure, blood oxygen, skin temperature and HRV.
Phone & smart

iPhone and Android

Music and calls.
Build

10 ATM water rating

52 g. 2 case sizes. Sapphire lens. MIL-STD-810.

Amazfit T-Rex 3 Pro full specifications

Overview

Brand	Amazfit
Model	T-Rex 3 Pro
Series	T-Rex
Versions	48mm, 44mm
Colours	Tactical Black, Black Gold

Platform & apps

Works with iPhone and Android phones, running Zepp OS.

No subscription needed.

Operating system	Zepp OS
Works with	iPhone and Android
Minimum iOS	iOS 15
Minimum Android	Android 7
RAM	64 MB
Storage	26 GB
Subscription	Not needed

Display

A vivid, high-contrast screen that is easy to read indoors and out.

1.5 in, up to 3,000 nits and touchscreen.

Display type	AMOLED
Screen size	1.5 in
Resolution	480 x 480
Peak brightness	3,000 nits
Colour display	Yes
Touchscreen	Yes
Controls	touchscreen, buttons

Design & durability

Comes in 2 case sizes (44, 48 mm) weighing 52 g.

Rated 10 ATM: fine for swimming, snorkelling and water sports. A sapphire lens resists scratches. Tested to MIL-STD-810 for shock, heat and cold.

Case sizes	44 / 48 mm
Case shape	Round
Dimensions	48 x 48 x 14 mm
Thickness	14 mm
Weight (case)	52 g
Case material	fiber-reinforced polymer
Bezel material	Grade 5 Titanium
Lens	Sapphire Glass
Band material	silicone
Band width	22 mm
Band fitting	22mm Quick Release
Fits wrists	145-210 mm
Water resistance	10 ATM
Water standard	ISO 22810:2010
MIL-STD-810 tested	Yes

Battery

Weeks between charges: up to 25 days in smartwatch mode.

With GPS on, up to 85 hours, or 38 hours in multi-band mode. Real battery life depends on screen brightness, notifications and workouts.

Battery (smartwatch mode)	25 days
Battery (GPS)	3.5 days
Battery (multi-band GPS)	38 hours
All battery modes	Smartwatch: 25 days; Multi-band GPS: 38 hours; Battery saver: 3.1 days; GPS: 3.5 days; Max battery GPS: 4.8 days
Battery capacity	700 mAh
Battery type	Built-in battery
Charging	puck
Full charge time	180 min

GPS & navigation

Built-in multi-band GPS for accurate tracks, even near tall buildings and trees.

You can download maps to the watch.

GPS	Built-in
Multi-band GPS	Yes
Automatic GNSS mode	Yes
Maps	Downloadable maps
Navigation features	turn-by-turn, round-trip routing, back-to-start, waypoints, course import
Golf courses	40,000
Ski maps	Yes

Health & sensors

A health-focused watch: it measures blood pressure, blood oxygen, skin temperature and HRV.

For sleep, it offers a nightly sleep score.

Sensors	optical HR, SpO2, skin temperature, accelerometer, gyroscope, barometer, compass, ambient light, thermometer, depth
Heart-rate sensor	BioTracker 6.0
Heart-rate tracking	24/7
High/low heart-rate alerts	Yes
Heart-rate variability	Yes
Blood oxygen (SpO2)	Yes
Skin temperature	Yes
Respiration rate	Yes
Blood pressure	sensor
Sleep tracking	Sleep score
Stress tracking	Yes
Energy score	BioCharge
Readiness score	Readiness
Cycle tracking	Yes

Safety

Fall detection	No
Live tracking	Yes

Training

Built for training, with the metrics serious athletes use.

187+ sport profiles. It adds a triathlon mode and daily suggested workouts.

Sport profiles	187
Auto activity detection	Yes
Triathlon / multisport	Yes
Swim tracking	Pool and open water
Training metrics	VO2 max, training load, training effect, lactate threshold, recovery time
Adaptive coaching	Yes
Heart-rate broadcast	Yes
External sensors	Bluetooth HR strap, power meter, foot pod, speed/cadence

Smart features

Smart extras include music storage and calls on the wrist.

Voice assistant: Zepp Flow.

Notifications	Yes
Message replies	Android
Calls on the watch	Yes
Speaker	Yes
Microphone	Yes
Voice assistant	Zepp Flow
Cellular	None
Music storage	Yes
Wi-Fi	Wi-Fi 2.4GHz
Bluetooth	Bluetooth 5.2
Find my phone	Yes
Flashlight	Yes

Diving, golf & more

It works as a dive computer for single-gas scuba.

Rated to 45 m.

Specialist modes	golf, hunting, ski
Diving	Single-gas dive computer
Max dive depth	45 m
Dive standard	EN 13319:2000, ISO 6425:2018, GB/T 18828-2022

Specs compiled from Amazfit's product pages and datasheets, with some identifiers from Open Icecat. Manufacturers revise hardware between versions, so check the version on the box. Spotted an error? Tell us.