LQM Bluetooth Hands-free Phone System Visor Bluetooth Automatically Answer Using a condenser microphone, call clarity, reduce the minimum echo In the cockpit allows you to more clearly hear each other's voice Using 2W amplifier to ensure that the sound pressure of the call, even if your cockpit same quiet enough you can clearly hear each other's voice Low-power Bluetooth chip coupled with a large-capacity lithium battery, continuous talk 20 hours two weeks without recharging. Suits for iphone 7 6S 6 Plus 5 5S 5C 4S 4 Samsung Galaxy S5 S4 S3 S2 Note 3 2 HTC ONE M8 M7 Sony xperia and so on Bluetooth Smartphones