The Amazfit T-Rex 3 Military Smart Watch is a rugged and capable outdoor smartwatch designed for adventurers, athletes, and anyone who wants a tough wearable that can keep up with an active lifestyle. Built with military-grade durability, this watch can withstand extreme conditions and rough use, making it a strong choice for hiking, trail running, camping, and everyday wear. The robust 48 mm case and reinforced build not only protect the internals but also give the watch a bold, striking presence on the wrist.

Equipped with built-in GPS, the T-Rex 3 offers accurate location tracking for outdoor workouts and navigation, while offline maps help you stay oriented even when your phone isn’t nearby. The integration of AI and voice control adds a modern convenience layer, letting you interact with the watch hands-free for tasks like starting workouts, checking stats, or setting reminders. This smartwatch supports both Android and iPhone devices, making it a versatile companion regardless of your smartphone choice.

Fitness and health tracking are core strengths of the T-Rex 3, with support for 170 sports modes that cover a wide range of activities from running and cycling to swimming and strength training. Comprehensive health metrics keep tabs on heart rate, sleep, stress levels, and more, while advanced training insights help you monitor performance and recovery. Whether you’re a seasoned athlete or just aiming to stay active, the watch provides data that’s easy to review and use.

Durability is taken seriously with this model — it’s water-resistant to 328 feet (100 meters), so it can handle swimming, rainy runs, and wet environments without blinking. The overall feature set balances outdoor ruggedness, smart functionality, and health-focused tracking, making the Amazfit T-Rex 3 a solid all-around choice for users who want both resilience and connected fitness in one device.

Product Overview
Brand Name: Amazfit
Model Name: T-Rex 3
Category: Outdoor / Military-Grade Smartwatch
Intended Use: Outdoor activities, fitness tracking, health monitoring, navigation

Display
Display Type: AMOLED color touchscreen
Display Size: 1.5 inches
Resolution: 480 × 480 pixels (high pixel density)
Brightness: Up to 2,000 nits for excellent outdoor visibility
Special Modes: Night mode, Glove mode (responsive with thin gloves)
Protection: Durable build suitable for rugged environments

Build & Design
Case Diameter: ~48.5 mm
Case Thickness: ~13.75 mm
Weight (without strap): ~68.3 g
Bezel Material: 316L stainless steel
Middle Frame Material: Polymer
Buttons: 4 physical buttons for reliable control in all conditions
Strap Material: Liquid silicone
Strap Width: ~22 mm
Water Resistance: 10 ATM (up to 100 m / 328 ft, suitable for swimming and freediving)
Temperature Tolerance: –22°F to 158°F (–30°C to 70°C)

Battery & Charging
Battery Capacity: 700 mAh (typical)
Charging Method: Magnetic charging base
Battery Life (Typical Use): Up to ~27 days
Battery Saver Mode: Up to ~40 days
Clock Only Mode: Up to ~81 days
GPS Mode (Accurate): Up to ~42 hours
GPS Long Battery Mode: Up to ~114 hours
Max GPS with Settings Off: Up to ~180 hours
Low-Temperature GPS Mode: Reduced but extended life in cold conditions

Sensors & Tracking
Heart Rate Monitoring: Yes (continuous, biometric PPG sensor)
Blood Oxygen (SpO₂) Monitoring: Yes
Accelerometer: Yes
Gyroscope: Yes
Geomagnetic Sensor (Compass): Yes
Barometric Altimeter: Yes
Ambient Light Sensor: Yes
Temperature Sensor: Yes
GPS Positioning: Dual-band GPS with support for multiple satellite systems for precise tracking
Health Metrics: Sleep, stress, VO₂ max estimates, HRV insights

GPS & Navigation
GPS Type: Dual-band positioning
Satellite Support: Multiple global systems for fast lock and accurate tracking
Offline Maps: Yes (downloadable topo and route maps)
Navigation Features: Routes, turn instructions, terrain support
Privacy Options: Ability to enable/disable GPS tracking to protect location privacy

Fitness & Sports
Sports Modes: 170+ built-in fitness and activity profiles
Outdoor Activities: Hiking, trail running, cycling, climbing, skiing, swimming, and many more
Workout Analytics: Activity summaries, performance feedback, training plans
AI Training: Personalized AI coaching and adaptive insights
Workout Recognition: Auto detection for select activities

Smart Features
AI Voice Control: Built-in mic for voice commands and speech-to-text replies
Privacy Controls: Enhanced data privacy with GPS disablement options
Smartphone Notifications: Yes (calls, texts, app alerts)
Music Controls: Yes
Connectivity: Bluetooth and Wi-Fi support
App Compatibility: Works with Zepp App for Android and iOS

Water & Durability Ratings
Water Resistance Rating: 10 ATM / 100 meters
Dive Certifications: EN13319, ISO 6425, GB/T 18828 (suitable for freediving up to ~45 m)
Shock & Temperature Resistance: Built to military-grade durability standards

Included in Box
Amazfit T-Rex 3 smartwatch
Magnetic charging base
Documentation / Quick Start guide