1. APP Support System: Android 4.4 and above, IOS above 9.0 2. Do not use a charger higher than 5V/2A. 3. The data cannot be used as medical reference. 4. The watch cant touch the hot water because the hot water would cause the watch display get fog. USB Quick Removal Direct Charge Brand new bracelet charging method, quick-release detachable wristband design, can be charged by plugging in the USB interface, eliminating the trouble of carrying a charging cable and charging stand. Smart Life Assistant The watch can monitor the steps, calories, heart rate, distance, sleep quality, etc. Of the day. At the same time, it can connected to a smart phone to view information, remotely take pictures, retrieve mobile phones and other thoughtful and convenient functions to make your life more convenient. Practical Keep abreast of your exercise intensity and physical condition in order to adjust your fitness plan in a timely Adultner. Skin-friendly material The bracelet wristband is made of lightweight skin-friendly soft TPU, which adopts lightweight design, no feeling to wear. Main Features * Model Number: D20 Pro Smart Watch * APP: FitPro * Bluetooth Version: Bluetooth 4.0 * Waterproof / Water-Resistant: Yes(Not for swimming ) * Operating mode: Touch button * Power on: press and hold the function key * Screen Type: 1.4 inch TFT LCD * Storage(FLASH)16MB+128KB * Compatible OS: Android,IOS * Functions: Sport,Message,Alarm Clock,Blood Oxygen,Date,MeasureAdultt of heart rate,Sedentary reminder,Sleep AdultageAdultt,Time * Notification type: Facebook,Twitter,Wechat,