X21 men's and women's smart sports watch touch- screen device is suitable for IOS and Android The main function: 1. Exercise records (pedometer, calories, sleep monitoring, mileage). 2. Sports health data can be shared in time on social forums such as WeChat/QQ/Weibo, Facebook, Twitter, etc. 3. Clock display, weather forecast, smart alarm clock, stopwatch. 4. Message reminder: phone, SMS, WeChat), QQ, Facebook, Twitter, Whatsapp, Instagram, Skype, Kakaotalk, Linkedin 6. Jump rope, riding, game ball, multiple sports modes. 7. Take pictures remotely, Twist- your wrist to light up the screen, and remind you to sit for a long time. 8. Search bracelet, search mobile phone, refuse to answer the call, do not disturb. 9. IP67 Dustproof- and waterproof, OTA firmware upgrade. 10. Support custom wallpaper and change wallpaper. 11. Full touch- screen. Smart watch support languages Seven default languages: English, French, German, Italian, Portuguese, Polish, Hardware parameters: System requirements: Android 4.4 and above, iOS 8.0 and above Central Processing Unit: HS6620 BT 4.0 Gravity sensor: MC3433 Heart rate sensor: HRS3300 Reminder: Engine LCD: 1.3 inches IPS 240*240 Operation mode: full touch- screen Battery type: polymer Battery capacity: 90mAh Standby time: 7 days Charging method: dedicated charging box Charging voltage: DC-5V Package Contents X21 smart watch * 1 Dedicated charger*1