1. Battery capacity: 80mAh 2. Bluetooth version : Bluetooth 4.0 3. Charging method:USB charging 4. Life time: Use 2-3 days, standby 5 days 5. Charging time: about 2 Hours 6. Waterproof rating: IP67 7. System: Android system 5.0 version or above,iOS system 8.0 version or above 8. APP support languages: English, Simplified Chinese, Traditional Chinese, Dutch, Russian, French, German, Portuguese, Spanish, Turkish, Japanese, Polish, Arabic, Malay, Thai, Czech, Slovak Function: 1. Heart rate monitoring,blood pressure monitoring,blood oxygen monitoring 2. Step,distance,calorie 3. Sleep monitoring (sleep duration, sleep quality) 4. Message reminder:Twitter message, Whatsapp message, Facebook message, Instagram message, SMS 5. Multi-sport modes:running, sit-up, skippiong rope 6. Call reminder, information push, alarm reminder, raise your hand to brighten, music control, weather 7. Sedentary reminder,remote camera,find my phone,find bracelet