Smart Watch Sweatproof /Bluetooth Phone /Pedometer /Heart Rate Detector /bluetooth 4.0 / BT calls /Compatible for iOS 5s/6/6s and 4.2 Android or Above SmartPhones /Black Compatible with both iOS and Android system Perfectly adapted with the standrad specifications of sizes 24mm strap Matching your style, freely collocation your own watch and strap Aviation class materials, CNC High-Strenth Maching Communication and Health Management function