Amazfit T-Rex Dual Solar 51mm Smartwatch, Black

The Amazfit T-Rex Dual Solar 51 mm, Black is an outdoor sport smartwatch with solar-assisted charging. Its dual-sided system collects light through the display and the glass-ceramic back to extend battery life. The round 1.32-inch AMOLED touchscreen has a resolution of 466 × 466 pixels and supports an always-on display. Brightness reaches up to 3,000 cd/m². GPS, GLONASS, Galileo and QZSS provide satellite positioning for outdoor activity tracking. A compass, barometer and altimeter add direction, atmospheric pressure and altitude data.

The case combines titanium, polymer and ceramic, with sapphire glass covering the display. A removable black silicone strap fastens with a pin buckle and fits wrists measuring 145–215 mm. The watch runs Zepp OS and pairs with Android and iOS phones. Phone notifications can appear on the wrist, with haptic feedback for a physical alert. There is no mobile network connection, which is worth noting if independent cellular connectivity is needed. Charging uses a magnetic connector, and a magnetic charging cable is included.

• BioTracker 6.0 PPG heart-rate sensor, blood-oxygen monitoring and sleep analysis for health tracking.
• 660 mAh battery with a listed charging time of two hours.
• Bluetooth 5.2, Bluetooth Low Energy and Wi-Fi for wireless connectivity.
• Built-in microphone and speaker for audio input and output.
• 64 GB of flash memory for on-device storage.
• Multisport modes, step counting, calorie tracking and personal goals for activity monitoring.
• Listed weight of 94.5 g as a reference for wrist-worn bulk.