Specifications Screen 1.3 inches IPS, round glass Resolution: 240 x 240 pixels Bluetooth 4.0 Battery: 100 mAh Stand-by time: up to 7 days IP65 Waterproof - This product is only surface splash proof (cold water). Do not use it for swimming or diving in water. Suitable for hand washing and sweat. Compatibility: Android 4.4 or higher, iOS 8.0 or higher Application: FITPRO Functions Time/date display Pedometer, calories, distance covered Heart rate, blood pressure, blood oxygen monitor Sleep monitor Multi-sport mode Notifications: Call, SMS, social networks (Facebook, Instagram, etc), sedentary reminder Camera control, alarm clock, find phone function, etc.