1. APP Support System: Android 4.4 and above, IOS above 9.0_x000D_2. Do not use a charger higher than 5V2A._x000D_3. The data cannot be used as medical reference._x000D_4. The watch can't touch the hot water because the hot water would cause the watch display get fog._x000D_USB Quick Removal Direct Charge_x000D_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._x000D_Smart Life Assistant_x000D_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._x000D_Practical_x000D_Keep abreast of your exercise intensity and physical condition in order to adjust your fitness plan in a timely manner._x000D_Skin-friendly material_x000D_The bracelet wristband is made of lightweight skin-friendly soft TPU, which adopts lightweight design, no feeling to wear._x000D_Main Features_x000D_* Model Number: C68 Ultra Smart Watch_x000D_* APP: HryFine_x000D_* Bluetooth Version: Bluetooth 5.0_x000D_* Waterproof Water-Resistant: YesNot for swimming _x000D_* Operating mode: Touch+button_x000D_* Number of keys:1 side buttonfunction key_x000D_* Power on: press and hold the function key_x000D_* Screen Type: 1.44 inch TFT LCD_x000D_* StorageFLASH16MB+128KB_x000D_* Compatible OS: Android,IOS_x000D_* Standby time: 3-5days normally use; 15 days standbybased on 230mAh_x000D_* basic functionstepdistanceCalorieHeart RateBlood PressureOxygen MonitoringSleep monitoringcall reminderSMS AlertsSocial APP Message ReminderAlarm clock reminderA sedentary remindersportTurn the wrist and shine the screenLooking for braceletsLooking for PhonesRemote PhotographyDo Not Disturbdial pushCustom watch face_x000D_* App notification reminder: support SMS,call reminder, social APP message reminder, WeChat, QQ, Facebook,Twitter, Line, Whatsapp, Instagram_x000D_* Alert type: Vibration_x000D_* Language supported by the APP:English, Simplified Chinese, French, Spanish, Polish, Portuguese, Italian, German, Dutch, Turkish, Russian, Czech, Persian, Hungarian, Greek, Arabic, Filipino, Malay , Indonesian, Vietnamese, Thai, Ukrainian22 countries_x000D_Package Contents_x000D_1 x Smart Watch_x000D_1 x Manual_x000D_1 x Box_x000D_Tips for use_x000D_1. This product can only seurface splash waterproofCool water,please don't wear it to swim,drop it to the water or soaked in water ect._x000D_2. When you first receive the product, charge it for 5-10 minutes at first if it cannot be turned on because it is already low on power._x000D_