Key Features:OS: Android 7.1, CPU: MT6739.Frequency Band: 4G LTE-FDD B1/2/3/5/7/12/20, WCDMA B1/2/5.RAM 1GB + 16GB in flash.Bluetooth 4.0/ GPS Navigation / WiFi Supported.Heart Rate Monitor, Pedometer, Multi Sport Mode.600mAh high capacity battery.Built in 8MP Camera.Display moving to light it.1.39 inch 454*454 screen.Replacement strap.Stylish popular clock interface for choice.Support iOS 11.1 version above and Android 6.0 version above.Manufacturer Specifications General Smart WatchEquipped with 2.03 inch Screen & 8MP CameraSupport 4G / WIFI NetworkBuilt-in nano SIM card slot, support 4G connection and hands free phone calls. With high speed data transmission, You can surf the internet anytime and anywhere.Variety of Fitness OptionsEquipped with heart rate sensor and multiple sports mode, the LEM X Fitness app can track your basic vitals rather reliably. It also support Bluetooth earphone connection. You can listening your favorite song when you are running.Android 7.1 OS, Support Va