1. Battery capacity: 300mAh 2. Touch: Full touch 3. Bluetooth version : Bluetooth 4.2 4. Resolution:240*240 5. Charging method:USB charging 6. Life time:5-7 days of use, 20 days of standby 7. Charging time: About 100 minutes 8. System: Android system 5.1 version or above,iOS system 8.0 version or above 9. Firmware language: Chinese, Traditional Chinese, English, German, Korean, Spanish, Japanese, French, Russian, Arabic, Ukrainian, Portuguese 10. App languages: Chinese, Traditional Chinese, English, Korean, German, Spanish, Japanese, French, Italian, Russian, Portuguese, Arabic, Ukrainian Function: 1. Bluetooth call,heart rate monitoring,blood pressure monitoring,blood oxygen monitoring 2. Step,distance,calorie 3. Sleep monitoring (sleep duration, sleep quality) 4. Social APP message reminder:Gmail,CNN APP,ZAKER,LINE,Facebook, Instugrate,Facebook Message,QQ,Message,wechat 5. Multi-sport modes, scientific analysis to manage your health 6. Bluetooth dual headset calling, weather, local MP3 playback 7. Daily alarm clock, photo control, sedentary reminder, find phone, find bracelet