Best partner of cell phone (Android version and IPHONE version), anti-lost alert, with Bluetooth, answer call by a button; Specialty design, elegant and fashionable; Easy to operate and convenient to wear; APK, used for reading synced SMS only works for Android phones; Can be downloaded through the after sale center of our site; The bracelet is charged through standard Micro USB input port; Pedometer: 3D gravity sensor gyro; Memory: 32MB; Speaker: 0.9W; Microphone: 38dB; Flat vibration motor: 8 x 2.7mm