Product description:Chip: SC7A20Screen: 1.32" 360*360, full fit and full touch screenOperation method: Full screen touch + Two keys + encoderBluetooth version: Bluetooth 5.0 BLEBattery capacity: 220mAhCharging method: Magnetic adsorption chargingCharging time: about 60 minutesStandby time: about 30 daysUse time: about 5 ~ 7 day (Use time is determined by frequency of use. Frequent use will reduce use time)Waterproof level: Life Waterproof (Note: Please don't use it when swimming and showering)Compatible system:iOS 9.0 and above Android 5.0 and aboveWatch Support language:Chinese, Traditional Chinese, English, German, Korean, Spanish, Japanese, French, Russian, Arabic, Ukrainian, Italian, PortugueseAPP support language:Arabic, Bulgarian, Czech, Danish, German, Spanish, Finnish, French, Indian, Croatian, Indonesian, Italian, Japanese, Korean, Norwegian, Dutch, Polish, Pashtun, Portuguese, Russian, Swedish, Thai, Ukrainian, Vietnamese , Simplified Chinese, English, Traditional ChineseFunctions:* Dial: A variety of interface designs on the APP side are optional for users to use* Exercise heart rate/resting heart rate detection: Manual\Automatic detection (The continuous heart rate switch is enabled on the APP side)* Timer, Pedometer, Calorie Consumption, Distance Calculation, Heart Rate, Blood Pressure, Blood Oxygen, Sleep Time / Quality, On & Off dispaly, Multiple sports modes* Sleep detection (sleep time, sleep quality)* Calls to remind, SMS reminder, Third-party messaging reminder Multilingual push, Alarm clock, Remote camera, Sedentary reminde* Synchronous data to APK / APPNote:Portable devices monitors human activities through electronic sensors, and they are at the consumer electronics level. it is normal for certain deviation. The users should treat data objectively.- Please do not over-read compared to hospital equipment, it is NOT a medical device- Before using, scan the QR code on the manual to download the app and connect it to the watch with APP.- For Android users: please always authorize APP to access all phone functions and always let it operate. And please turn on the GPS on your phone before you connect it.- Please charge it for 2-3 hours when you receive it. It was run out of power after the long delivery. Thanks