Pama Alpha Bluetooth Handsfree Sun Visor with Caller Name Display (Black) Blue Backlit LED Display Can be Paired with up to 4 devices (will only operate with one at a time) D.S.P. Digital Signal Processor for enhanced call audio quality Bluetooth V2 compatible (voice) - Talk time 15 hours/250 hours standby - Battery level indicator - Echo cancellation Noise suppression - No wires and no installation required Downloads the phonebook from you Sim Card and displays the entry name if stored