by direct transfer, no loss of music quality. Metal panel on top. bluetooth module integrated in the adapter. supports A2DP, AVRCP and / HFP. AUX input for 3.5mm plug (no control on the radio possible) USB input only for charging search within the title possible (forward / rewind) 1. Name: bluetooth adapter for original radio 2. Color: Black 3. Material: ABS 4. Fitment: For A2 A3 8L 8P A4 B5 B6 B7 A6 4B A8 4D Service: as usual via the buttons on the radio / steering wheel. Track numbers are displayed until 99, then it starts again at 01. wireless streaming of music via mobile phone (requires bluetooth A2DP standard) The tracks can be controlled via the radio / steering wheel buttons. Additional control via the supplied cable remote control possible. Speakerphone: Telephone connects automatically via bluetooth to the handsfree. In adapter mode, the music stops when an incoming call rings and it rings in the loudspeakers. Accepting the conversation via the radio / steering wheel button song. End the call via the radio / steering wheel button Previous song. in radio mode the adapter must be for acceptance. Playback of the caller via the car speakers Microphone can be placed optimally to the head with the 2.5m cable Installation: The adapter is simply connected to the CD changer input on the back of the radio The changer input is also available if the CD changer is not installed The radio does not have to be mp3-compatible no activation or programming in the workshop necessary Package Include 1 x USB adapter box 1 x Connection cable 8pin 1 x Hands-free microphone with cable 1 x Adapter 1 x 3.5mm AUX cable 1 x Manual Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.