Waterproof (IP67) touch screen activity tracker with high quality OLED screen. The activity tracker counts your steps, distance walked, calories burned and records your sleeping pattern. The bracelet has dynamic heart rate measuring to improve your sport performance. The bracelet uses Bluetooth 4.0 and has a standby time of 5-7 days on one charge. The free APP is compatible with iOS 8.1 and higher and Android 4.4 and higher.