Design & Build
Case Size (without heart rate base): 48 × 48 × 14 mm
Weight (without strap): 52 g
Case Material: Fiber-reinforced polymer
Bezel & Buttons: Grade 5 titanium
Buttons: 4
Water Resistance: 10 ATM (suitable for swimming, high-speed water sports, freediving, and recreational scuba to 45 m)
Display
Type: AMOLED
Size: 1.5"
Resolution: 480 × 480
Pixel Density: 322 PPI
Peak Brightness: Up to 3,000 nits
Glass: Sapphire crystal touchscreen
Battery & Power
Battery Capacity: 700 mAh (rated)
Typical Use Battery Life: Up to 25 days
Heavy Use Battery Life: Up to 10 days
Accurate GPS Mode: Up to 38 hours
Power-Saving GPS Mode: Up to 74 hours
GPS Long Battery Life Mode: Up to 85 hours
GPS Max Battery Life: Up to 116 hours (Hiking/Climbing GPS-only mode)
Low Temperature Mode (GPS on): Up to 25 hours
Low Temperature Mode (GPS off): Up to 25 days
Sensors
Health: BioTracker™ 6.0 PPG biometric sensor (5PD + 2LED)
Movement & Environment:
Accelerometer
Gyroscope
Geomagnetic sensor
Barometric altimeter
Ambient light sensor
Temperature sensor
Positioning
Satellite Systems: 6 GNSS systems
Antenna: Circularly-polarised GPS antenna
Modes: Accuracy, Automatic, Power Saving, GPS Long Battery Life, GPS Max Battery Life
Connectivity
Wireless: Wi-Fi 2.4 GHz, Bluetooth 5.2, BLE
NFC: Zepp Pay support (region-dependent)
Strap
Material: Silicone
Width: 22 mm quick-release
Wrist Fit: 145–210 mm
Buckle: Classic pin buckle
Compatibility
Supported Devices: Android 7.0 and above; iOS 15.0 and above
App: Zepp App
Sports & Health
Sports Modes: 187+
Smart Recognition: 25 strength training movements, 8 sports movements
Advanced Running Support: Track Run, smart trajectory correction, virtual pacer
Coaching & Analytics: Zepp Coach™, PeakBeats™, VO₂ max, Training Load, Training Effect, recovery time
24/7 Monitoring: Heart rate, SpO₂, stress, skin temperature, breathing rate
Sleep Tracking: HRV, stages (incl. REM), naps, breathing quality, sleep score
Health Systems: PAI, breathing exercises, altitude SpO₂ prompts, HR and stress alerts
In the Box
T-Rex 3 Pro with silicone strap
Magnetic charging head (no cable)
Instruction manual