Epresent i5 plus Smart Bracelet Wristband OLED Bluetooth 4.0 waterproof ip68 Fitness Tracker Pedometer Calorie Tracking Sleep Monitor (BLUE) This Smart Bracelet can display the time, steps, distance and calorie clearly. Let you know your sports data right now! When you have calls or SMS, the smart bracelet will vibrate to remind you. When bluetooth paired, you can sync your data to Andriod Phone (OS must be 4.3 or above and Bluetooth must be V4.0) and ios phone (ios must be 7.0 or above and Bluetooth must be V4.0). It gives you real-time assessment of your exercise throughout the day. Accurately monitor total effective sleeping time and motions every night (including light sleep and deep sleep). It has a unique standard USB port in the host. So it is available for charging with computer and battery bank without any other charging components. Bluetooth Version: V4.0