Feature: -USB in-line convenient charging, no charging cable, direct USB charging. -Built-in 80mAh battery, charging time about 2 Hours, normal use time about 7 days, standby time about 15 days. -Push support (Caller, SMS Messenger, app news reminders: QQ/Facebook/Twitter/Wechat, etc.) -Support heart rate / blood pressure / blood oxygen monitoring (This function is for reference only and can not be used for medical data.) -Pedometer (Exercise step, calorie consumption, movement mileage record.) -Support multi sports modes ( Running / Riding / Climbing / Swimming / Pingpong / Walking, etc.) Charging Method: USB Charger: You need to remove the main body from the bracelet first, As long as you have a USB interface, you can charge it at will.