... .Descreption:1, the black Bluetooth control box will be installed behind the radio or hidden beneath the console, leave keypad control ... loudspeaker system3, use car loudspeaker system to answer or make the phone call, Answer, make, reject and end calls easily and safely4, Automatically ... 4 speakers of the car7, the sound of Car audio will be back automatically when you end the callFeatures: 1, Wireless ...