Product parameters: 1. System requirements: Android 4.4 and above, iOS 8.0 and above, Blue tooth 5.0 support. 2. blue tooth version: BLE 5.0. 3. the blue tooth chip:Realtek RTL8762C. 4. Heart rate chip: Wiki pro source VC31. 5.Screen display: 1.28 inch IPS color screen. 6. Battery capacity: 200MAH. 7. Physical buttons: Full touch and button. 8. the motor: Built-in, vibration reminder. 9. the charging interface: Magnetic charging base. 10. waterproof level: IP68 waterproof. 11. the sensor: Gravity sensor STK8321. 12.APP: Tefiti. The use of the product introduction Main function: 1.24 exercise modes, heart rate monitor, blood pressure monitor, blood oxygen monitor, odometer 2. time and date display, step count, calories, distance with display screen 3. sleep monitoring (sleep time, sleep quality) 4.Standard motor function (step count, distance, calories), GPS track movement 5. time interface 6 types of USER INTERFACE dial display + huge dial + self-set disc, mechanical movement UI theme style, 7 messages View storage 6. Reminding phone calls, SMS, QQ, WeChat, preach, wang zhen, sina weibo, instagram, linkeln, Snapchat, explosions, Facebook, Skype, Twitter, WhatsApp, Line, KakaoTalk the content of the delivery message 7. Stopwatch, cell phone search, hand display, sedentary reminder, alarm clock reminder (3), drinking water reminder, medication reminder, shake photo, female physiology reminder 8. time, Smart Alarm Clock, Raise Hands and Brightness Screen, Brightness Screen Time, Find Mobile Phone, Find Brband, Call to Reject, Shake Photo, Do Not Disturb Mode (Do Not Disturb Time Settings, Turn off Brband Vibration, Turn Off Information