Main Features: Model Number: D20 Pro Smart Watch APP: FitPro Bluetooth Version: Bluetooth 4.0 Language: English,French,Italian,Japanese,Korean,Polish,Portuguese,Russian,Simplified Chinese,Spanish,Traditional Chinese,ect Waterproof / Water-Resistant: Yes(Not for swimming ) Operating mode: Touch button Power on: press and hold the function key Screen Type: 1.3inch TFT LCD Storage(FLASH)16MB+128KB Compatible OS: Android,IOS Standby time: 4-7days normally use; 30 days standbybased on 230mAh Functions: Sport,Message,Alarm Clock,Blood Oxygen,Date,Measurement of heart rate,Sedentary reminder,Sleep management,Time Notification type: Facebook,Twitter,Wechat,WhatsApp Alert type: Vibration