Amazfit GTR 2 Classic Aluminum Alloy Smart Watch (AMAZFIT-GTR2-CLASSIC) - Resolution: 454 x 454, Capacity: Air Pressure Sensor, Acceleration Sensor, Gyroscope Sensor, 3-Axis Geomagnetic Sensor, Ambient Light Sensor, Bluetooth Frequency: Bluetooth 5.0, Wlan 2.4ghz16, Touch Screen: Tempered Glass, Anti-Fingerprint Coating, Odlc Coating, Waterproofing Grade: 5atm8, Microphone: Yes, GPS Supported, Operating system: Android 5.0 Or Ios 10.0 And Above