Features: 1.Fit for Pioneer IP?BUS radio, such as for DEH?P2500 R, DEH?P2600 R, DEH?P3500 MP, etc. 2.Allows you to hear music from your phone/tablet/mp3 (they should have Bluetooth capabilities). 3.Bluetooth 5.0 version, support Bluetooth 2.0 3.0 4.0 5.0, high sensitivity, stable performance. 4.Simply 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.Match your phone or pad to bluetooth module, and choose Aux from your radio, then you can use your phone to play music through car speakers. Specification: Item Type: Bluetooth AUX-IN Adapter Material: ABS Bluetooth Version: Bluetooth 5.0 (support Bluetooth 2.0 3.0 4.0 5.0) Fitment: Fit for Pioneer IP-BUS Radio Compatible with all devices of the for P-series, for example: DEH-P2500 R, DEH-P2600 R, DEH-P3500 MP, DEH-P6600 R, DEH-P9600 MP DEH-P3100 UB, DEH-P4100 SD, DEH-P5100 UB, DEH-P7100 BT, DEH-P8100 BT DEH-P88RS-II-DEHP88RS, etc Wiring Instructions: The red wire is connected to the positive pole The black wire is connected to the negative pole Signal receiving connector is connected to the radio signal interface PackageList: 1 x Bluetooth AUX-IN Adapter Note: Please activate the correct source (i.e. AUX / EXT / CD?CH) on your headunit for this adapter !