Display 1.65 ", 442x348 pixels, OLED, color display, touchscreen, rectangular, Operating system proprietary, Interfaces Bluetooth 5.0, Integrated pulse measurement (optical), Measurement functions time, stopwatch, countdown, pedometer, swimming strokes, speed, distance, lap counter, sleep monitoring, heart rate, oxygen intake, calorie consumption, altimeter, air pressure, Other functions Date, calendar, alarm clock, 12/24 hour display, weather forecast, camera control, music control, internal music storage, notification of messages, notification of calls, inactivity alarm Sensors accelerometer, gyroscope, light sensor, barometer, Navigation compass, GPS, GLONASS, Compatibility from Android 5.0, from iOS 10, Power supply battery (246mAh), Glass type mineral glass, Housing material aluminum, plastic, Strap material silicone, Colors black, Dimensions (housing) 42.8x35.6x9.7mm, Width (bracelet) 20mm, Weight 24.7g, Special features Loudspeaker, microphone, vibration, waterproof (5ATM), exchangeable wristband