About Product 1. Bluetooth chip:Ruiyu 8763EWE 2. Bluetooth version: BLE 5.2, BT3.0 3. Screen resolution: 412 x 412 4. Battery capacity: 500mAh 5. Waterproof level:IP68 6. Charging method: magnetic charging 7. Standby time:Just turn on 4.0 Bluetooth for about 25 days 8. Woking time:Turn on 4.0 Bluetooth for about 10 days, turn on the call 3.0 Bluetooth 84h 9. Compatible system: Android5.0 or above, iOS10.0 or above 10. APP:FitCloudPro 11. APP support languages: Android: English, Chinese simplified, Chinese traditional, German, French, Arabic, Czech language, Greek, Spanish, Japanese, Persian,Italian, Korean, Dutch, Poland, Portuguese, Russian, Finnish, Swedish, Thai, Hungarian, Slovakia Asian, Albanian, Turkish, Ukraine, Hindi, Vietnamese iOS: English, Chinese simplified, Chinese traditional, German, French, Arabic, Czech, Greek, Spanish, Japanese, Persian,Italian, Korean, Dutch, Poland, Portuguese, Russian, Finnish, Swedish, Thai, Hungarian, Slovakia Asian, Albanian, Turkish, Ukraine, Hindi, Vietnamese 12.Watch support languages:Factory default English English, German, Russian, Spanish, Portuguese, French, Italian, Polish, Chinese, Thai, Indonesian, Vietnamese, Malaysian, Indian, Japanese, Hebrew Main Function 1. Heart rate monitoring,blood pressure monitoring,blood oxygen monitoring 2. Step,distance,calorie 3. Sleep monitoring (sleep duration, sleep quality) 4. Respiratory training,voice assistant,bedside clock,GPS trajectory movement, recording function 5. Calling reminder, calls, text messages, emails, WeChat, QQ, Facebook, X, WhatsApp, LinkedIn, Instagram, Messenger, Snapchat, LINE, Viber, Skype message content push 6. WeChat exercise access, sports target settings, fitness information sharing 7. Weather, smart alarm clock, raising your hand on your screen, looking for your mobile phone, looking for a hand ring, calling to refuse, do not disturb the mode