Amazfit GTR 3 46mm – Thunder Black / 21-Day Battery Life / Alexa Built-in / GPS / Fitness Tracker with 150+ Sports Modes / AMOLED Display / Heart Rate Sleep Health Tracker

Brand : Amazfit Type : Smart Watch Model Number : A1971 Color : Moonlight Grey Dimensions : 45.8x45.8x10.8mm Weight (without strap) : 32g Body Material : Sport-Aluminum alloy Buttons : 2 Water-resistance Grad : 5 ATM Display Material : AMOLED Size : 1.39" Resolution : 454x454 PPI : 326 Touchscreen : Tempered glass, Anti-fingerprint coating Battery Capacity : 450 mAh (typical value) Charging Method : Magnetic charging base Theoretical Charging Duration : Approx. 2 hours Typical Usage Scenario Battery Life : Up to 21 days Sensors : Health - BioTrackerTM3.0 PPG biometric sensor (supports blood-oxygen, 6PD + 2LED) | Movement - Acceleration sensor, Gyroscope sensor, Geomagnetic sensor, Barometric pressure sensor, Ambient light sensor | Positioning - GPS, GLONASS, Galileo, BDS, QZSS Connection : Bluetooth 5.1 BLE Strap Colors & Materials : Silicone, Quick release Strap Width : 22mm Min. & Max. Wrist Dimensions : 155-218mm Buckle : Classic pin buckle Microphone : Support (for Voice Assistant) Motor : Linear motor Classic Navigation Crown : Support Supported Devices : Android 7.0 and above, iOS 12.0 and above Application : Zepp App Sports Modes : 150+