EZON Smart Bluetooth Watch Multi-functional Wristwatch Sports Digital Watches for IOS/Android 4.0 Bluetooth Watch - built-in pedometer which can measure walking or running steps, display exercise distance and calories counter Exercise Monitor - review the exercise data and histogram in EzonRun APP after finishing exercise and analysis your exercise data Smart Reminder - exercise reminder, sedentary reminder, call reminder and alarm reminder 5 ATM Waterproof, two buttons easy to use, EL backlight, alarm USB Cable Battery Charger - take 2 to 3 hours to make full charging. Battery life about 3 months with bluetooth function off.