Features： The main function: 1,Exercise records (pedometer, calories, sleep monitoring, mileage). 2,Exercise health data can be shared in time on WeChat Moments/QQ/Weibo, Facebook, Twitter and other social forums. 3,Clock display, weather forecast, smart alarm clock, stopwatch. 4,Message reminder: phone, SMS, WeChat,QQ,Facebook,Twitter,Line, Whatsapp, lnstagram, Skype,Kakaotalk,Linkedin. 6,Rope skipping, cycling, playing ball, multiple sports modes. 7,Remote Photography,Turn the wrist and shine the screen,A sedentary reminder. 8,Looking for bracelets,Looking for Phones,Rejection of calls,Do Not Disturb. 9,Real-time static and dynamic detection of heart rate, blood oxygen and blood pressure. 10,IP67 grade dustproof and waterproof, OTA firmware upgrade. 11,Support custom wallpaper,Change wallpaper. 12,Full screen touch. Smart watch Support language Default seven languages:English, French, German, Italian, Portuguese, Polish, Russian.(Other languages need to be customized) Hardware parameters: System requirements: Android 4.4 and above, iOS 8.0 and above CPU: HS6620 BT 4.0 G-sensor: MC3433 Heart rate sensor: HRS3300 ReminderS: Motor LCD: 1.3inch IPS, 240*240 Operation method :Full screen touch Battery type: Polymer Battery capacity: 90mAh Standby time: 7 days Charging mode :Dedicated charging box Charging voitage: DC-5V Package Contents X21 Smartwatch*1 Dedicated charging box*1 Chinese and English manual*1 Packing boxes*1