C21pro 1.39 inch Color Screen smartwatch Black About Product 1. Battery capacity: 410mAh 2. Bluetooth version :BLE 5. 23. Charging method:magnetic charging 4. Waterproof rating: depth waterproof 5. Resolution:360x 3606. System: Android system 6.0 version or above,iOS system 9.0 version or above 7. APP:FitcloudPro 8. APP support languages: Danish, Ukrainian, Russian, Croatian, Hungarian, Hindi, Indonesian, Trkiye, Hebrew, Greek, German fried Italian, Czech, Slovak, Japanese, French, Lanzhou, Thai, Swedish, Simplified Chinese, Traditional Chinese, Finnish, English, Dutch, Portuguese, Spanish, Vietnamese, Albanian, Arabic, Korean 9. Watch support languages:Chinese, English (default), German, Korean, Spanish, Japanese, French, Russian, Arabic, Ukrainian, Italian, Portuguese, Romanian, Polish, Turkish in total 15 typesFunction 1. Heart rate monitoring,blood pressure monitoring,blood oxygen monitoring 2. Step,distance,calorie 3. Sleep monitoring (sleep duration, sleep ) 4. Weather, WeChat sports, information reminders (messages, drinking water, sedentary, alarm clock),Women's Health cycle,stopwatch, countdown 5. Find the phone, find watch, camera control, dial switching, music control,Settings 6. Pword lock, breathing training, sports, sports history, do not disturb mode, power saving mode, low power reminder, voice istant (SIRI) 7. Call function, favorite s, phone dial, split screen function, scan code connection, calculator, calendar 8. Message and Call Alerts:Phone, SMS, WeChatQQSkype etc. 9. Multi-sport modes: Walking, running, mountaineering, cycling, basketball, swimming, badminton, and football etc.