Bluetooth headset is a short distance wireless communication technology using by Low radiation, you can easily make and receive calls while traveling, office or driving by connecting the headset to supported Bluetooth wireless technology compatible cell phone. Before using it, please read the instruction carefully in order to know the way to use it in safe and maintenance information. You can connect to compatible communications equipment without using cables by Bluetooth wireless technology. The connection does not require that the phone and the headset to position the positive. However, the maximum distance between them should not exceed 10 meters. Bluetooth connection may obstructions by walls or other electronic devices interference, and distance connections may also be shortened.