plus, iPhone 7/7S plus,etc.); Android 4.4 or above. you can easily track and review your progress via APP. If you still have time, please pull down to see the product
mobile devices:
iOS system: Must be iOS 7.0 or later, Bluetooth 4.0; Such as: iPhone 4S / 5 / 6, iPod touch 5, etc.;
Android system: Must be Android 4.3 or later, Blu...
