USB Bluetooth Receiver dedicated for AUDI AMI OEM head units allows you to listen to music through devices without the bluetooth function with AUX input. Bluetooth V3.0, support A2DP V1.2 ; Power supply: 12V ; Output: Jack 3.5mm straight Distance: up to 5 metres ; * Important - The bluetooth adapter can be paired only with one device in a time. If you would like to connect second device please make sure that the first device is disconnected and then connect second device to blutooth adapter. If you would like to connect the first device again and you face some difficulties , please remove (in device bluetooth settings) the bluetooth adapter from memory of first device and try to search and connect it again.