?Waterproof Fitness Smartwatch?comes with a built-in USB charging cable. Just align the charging port, it will automatically adsorb and charge. Once fully charged (2 hours), it can work for 7 days and standby for longer. IP68 waterproof standard, you can wear it when washing hands or running in the rain (Note: Please do not wear it in water temperature over 40?/104?). Timely and effective after-sales service. If you have any questions, please feel free to contact us. ?Fitness Tracker for IOS and Android?Compatible with most iOS 8.0 and Android 4.4 or above smartphones, easy to pair with READsport APP together. Smart alert function, vibrate to notify you of incoming calls, messages, notifications from apps (Facebook, WhatsApp, Instagram and Twitter, etc.) You can also hang up your incoming calls with the watch. ?Accurate Heart Rate and Sleep Monitor?Automatically detect and track your heart rate and sleep throughout the day, easily view the data in READsport APP, automatically analyze your heart rate, sleep quality and sleep time, let you know how you are doing, easy to help you improve and form a healthier lifestyle. ?Multifunctional Pedometer?Free READsport APP, customize special dial face for special you, define your different mood. This sports watch also has usual utility, female menstrual cycle calculation, flip wrist bright screen, remote camera, weather forecast, sedentary reminder, water reminder, alarm clock, stopwatch, find watch, deep breathing guide and other functions to meet your daily needs. ?Intelligent Activity Tracker?The fitness smartwatch will accurately and automatically track your action data throughout the day, such as steps, distance, calories burned, and activity time. Include a variety of sports modes (such as fitness, running, cycling, hiking), and you can view the sports data in READsportAPP after the sports are finished.