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Sports Running, walking, swimming, cycling... Sleep & Heart Rate & Body Temperature] Monitor your real-time heart rate, temperature, sleep time. Help you improve your lifestyle through recording sleep quality and time data. Notice: IF you have any questions about this smartwatch please feel free to contact me. I will make every effort to provide the best solution for you. Longer Battery Life & Compatibility] Full charge requires only about 2 hours and the working time can be 5-7 days. The app supports smartphones with Bluetooth 4.0 or above(not for tablets).Support iOS 8.0 above,Android 5.1 above. Call & Message Notification] After connecting the smartwatch to your android Or ios phone, you will not miss any calls or messages. When your phone receives a call, SMS, or SNS (Facebook, Twitter, WhatsApp, Linkedin, Messenger, Instagram), it will vibrate and notify you. The sports watch can make and receive calls, sync the phone book, the call record, etc Tips DON'T take to shower or Use in water(Little water on faces such as small rain or Washing Hands is OK). Designed to charge by the computer USB port, don't use other chargers, incorrect charge by other chargers may hurt the battery. Don't heat the battery or use it in a hot condition(such as in a hot car in summer).