Feature : 1 . Bluetooth AUX-IN adapter, suitable for replacing the B5 hole in your Blaupunkt CD player. 2 . 8pin interface, plug and play, easy to operate and convenient to use. 3. Compact size, lightweight and portable, easy to carry and store. 4 . Just plug the black connector into the socket on the back of the radio, then connect the red wire to 12V + and the black wire to 12V-. 5 . Built to standard specification, strictly follow factory quality control. Specification: Item Type: AUX-IN Bluetooth Adapter Material: ABS Wiring: Connect the red wire to the positive pole Connect the black wire to the negative pole Insert the CD player jack (please confirm the corresponding jack), connect the mobile phone to the Bluetooth module, and select AUX audio source to play mobile music. Interface: 8Pin to Bluetooth module Installation: Suitable for replacing the B5 hole for Blaupunkt CD player Suitable for the Blaupunkt CD player Suitable for Fiat Bravo CD Player, for Lotus / L3 Package List : 1 x AUX-IN Bluetooth adapter