Amazfit T-Rex 3 Pro
Premium rugged smartwatch with scuba diving capabilities and enhanced military-grade durability
Where to Buy
€379 / $399Prices and availability are subject to change. We may earn commission from these links.
Overview
The Amazfit T-Rex 3 Pro is a premium rugged outdoor smartwatch with recreational scuba diving capabilities up to 45m and freediving support. Featuring Grade 5 titanium bezel and buttons, sapphire glass display, and military-grade durability. Available in 48mm (1.5" display) and 44mm (1.32" display) sizes with up to 25 days battery life, dual-band GPS, BioTracker 6.0 sensor, and comprehensive health monitoring via Zepp OS.
Technical Specifications
Physical Specs
| Case Size (mm) | 48 x 48 x 14 mm (48mm model), 44.8 x 44.8 x 13.2 mm (44mm model) |
| Weight (g) | 52g (48mm without strap), 46.8g (44mm without strap) |
| Case Material | Fiber-reinforced polymer |
| Bezel Material | Grade 5 Titanium |
| Lens Material | Sapphire glass touchscreen |
| Back Material | Fiber-reinforced polymer |
| Strap Material | Silicone |
| Water Resistance Rating | 10 ATM (EN13319, ISO 6425) |
Display
| Type | AMOLED |
| Size (inches) | 1.5 (48mm model), 1.32 (44mm model) |
| Resolution (pixels) | 480 x 480 (48mm), 466 x 466 (44mm) |
| Brightness (nits) | 3000 |
| Features | Always-On Display, Enhanced Night Mode, Adaptive Brightness |
Hardware
| Storage | Music storage supported |
Battery
| Typical Use | Up to 25 days (48mm), Up to 17 days (44mm) |
| Heavy Usage | Up to 10 days (48mm), Up to 8 days (44mm) |
| Low Power Mode | Up to 25 days (48mm with low temp mode), Up to 14 days (44mm with low temp mode) |
| GPS Mode | Accurate: 38h (48mm)/26h (44mm), Power-Saving: 74h (48mm)/51h (44mm), Long Battery: 85h (48mm)/60h (44mm), Max Battery: 116h (48mm)/86h (44mm) |
| Wireless Charging | Magnetic charging (no cable included) |
Diving - General Info
| EN 13319 Certified | Yes |
| Max Operational Depth Metres | 45 |
| notes | Certified for both freediving and recreational scuba diving up to 45 meters |
Diving - Scuba Features
| Supported | Yes |
| Dive Modes | Air Mode, Nitrox Mode, Multi-gas |
| Decompression Model | Bühlmann ZHL-16C with adjustable conservatism (high/medium/low) |
| Gas Mixes Supported | Air, Nitrox (enriched air) |
| Max PO2 (bar) | PO₂ alerts supported |
| Air Integration | No |
| Safety Features | Auto Start/End Detection (4-5ft depth), Safety Stop alerts (5m/15ft), Real-time TTS (Time to Surface), NDL (No-Decompression Limit) alerts, Decompression ceiling alerts, PO₂ alerts, Depth & Time alerts, No-Fly Time tracking, Water temperature monitoring, Dive compass (3-axis) |
| Dive Computer Functionality | Full recreational dive computer with Bühlmann ZHL-16C algorithm, adjustable conservatism, and comprehensive safety features |
| Limitations | Recreational diving only; No air integration; No technical diving support |
Diving - Freedive Features
| Supported | Yes |
| Max Depth (m) | 45 |
| Modes | Freediving, Spearfishing |
| Auto Depth Tracking | Yes |
| Surface Interval Tracking | Yes |
| Safety Alerts | Depth alerts, Time alerts, Water temperature monitoring |
Smart Features
| Operating System | Zepp OS |
| Health Monitoring Summary | BioTracker 6.0 PPG sensor, 24/7 Heart Rate, Blood Oxygen, Sleep Tracking, Stress Monitoring, Breath Training, Temperature Monitoring, HRV, PAI, BioCharge |
| Activity Tracking Summary | 187 sports modes, 25 strength training movements recognition, 8 sports movements recognition, Track Run mode, Virtual pacer, PeakBeats, Zepp Coach, TrainingPeaks sync |
| Smart Functions | Bluetooth Calling, Notifications, Music Control, Weather, Alarms, Timer, Stopwatch, Find My Phone, Call Quick Reply (Android), Voice Memo |
| Payment System | Membership Cards (region dependent) |
| Music Storage And Playback | Yes |
| Voice Assistant | Zepp Flow AI Assistant (select regions) |
| Navigation Features Summary | Dual-Band GPS, 6 satellite systems, Offline Maps, Route Import/Export, Real-time Navigation, Turn-by-Turn Directions, POI Search, Round-Trip Route Creation, Auto-Rerouting, Direct Return Navigation |
| Other Notable Features | Two-Color LED Flashlight (200 lux, 300 lux Boost Mode), Night Display Mode, Microphone, Speaker, Altitude Assistant, Ultra-low Temperature Mode, Storm Warning Alerts, Tide Display, Moon Phase, Compass |
Max Depth: 45m
EN13319 Certified: Yes
Pros
- Recreational scuba diving and freediving support up to 45m
- Grade 5 titanium bezel and buttons with sapphire glass
- Exceptional battery life (up to 25 days for 48mm model)
- Ultra-bright 3,000 nit AMOLED display
- BioTracker 6.0 PPG sensor with comprehensive health tracking
- Comprehensive offline maps and real-time navigation
- 187 sports modes with smart recognition
- Dual-band GPS with 6 satellite systems
- Zepp Flow AI Assistant
- Built-in two-color LED flashlight with boost mode
- Bluetooth calling with speaker and microphone
- Military-grade durability (MIL-STD-810H)
- Two size options (48mm and 44mm)
Cons
- No air integration for tank pressure
- Limited to recreational diving only (no technical diving)
- No ECG functionality
- Limited third-party app ecosystem compared to Wear OS/Apple Watch
- No USB-C cable included in package
- AI Assistant only available in select regions
- Higher price point than standard T-Rex 3