Safe driving, you keep your eyes on the road and your hands on the wheel. Portable, you can carry it from a vehicle to another. It says the name of the caller when you have an incoming call, so you don"t need to watch the display of the phone to know who is calling you. You say "OK" to pick up the call, so you don"t need to remove your hands from the wheel to press a button. Automatic reconnection between your phone and the Supertooth Voice when you go back into your car. No installation required, just clip it on your sun visor. Battery life: 15 hours talk time, 800 hours standby time Compatible with all Bluetooth-enabled phones, including Iphone, BlackBerry and Smartphones