Byttron Fitness Watch for Women, Fitness Tracker Touch Screen Smartwatch IP68 Waterproof Smart Watch with Heart Rate Pedometer Step Counter Sleep Stopwatch for iOS Android Phone (pink)

?Description: The mobile phone enters APP store (IOS system) or Google Play (Android system) searches for "H Band", download and install. (Note:After the Android phone is connected to watch,the app"H Band" needs to remain open.)?More feature settings: Go to the mobile app, set in "My device" to turn on more features. such as message notification, call, alarm clock, sedentary, switch setting, co...