Amazfit GTS 4 Infinite Black Watch

The Amazfit GTS 4 smartwatch is equipped with a rectangular AMOLED screen measuring 1.75 inches diagonally with a resolution of 390 × 450 pixels (pixel density — 341 ppi). The device is made in an aluminum alloy housing. The 300 mAh battery provides up to 16 days of battery life. Charging it with a magnetic charging platform takes about two hours to replenish it. The smart watch has a water resistance of 5 ATM and supports 154 sports modes. The available 4PD BioTracker 4.0 PPG optical sensor allows you to monitor heart rate, measure blood oxygen saturation (SpO2), as well as monitor sleep quality, monitor breathing, and stress levels. The smartwatch runs the Zepp OS 2.0 operating system, supports GPS, GLONASS, GALILEO, QZSS, BeiDou satellite navigation and is compatible with devices based on Android 7.0 and above and iOS 12.0 and above.