X.CELL APOLLO WATCH W4 Technical Data Display: 1.83" HD Display Water Resistance: IP68 Sensors: G Sensor /Heart rate sensor Charging port: Magnetic charging base Charging Time: 1 Hours 30 Minutes Battery Life: 3-5 Days (15 days standby) Compatibility: IOS 8.0+ / Android 5.1+: Bluetooth5.3 Battery 300mAh Workout Detection Receive & Make Calls High Resolution HD Screen Oxygen Level Monitoring SpO2 Blood Pressure Monitoring Heart Rate Monitoring IP68 Water Resistance Arabic, Persian, Interface Notifications