Car Radio BT 5.0 AUX-IN Adapter KCA-121B Auxiliary Aux Audio Wiring Ai-net Replacement for Alpine Black Features: Replacement for Alpine Radio Ai-net Port. Just plug the 12pin connector into the socket back of your radio You can just Insert this item to the back radio then Connect the red wire to 12V+, the black wire to 12V-. Match your phone or pad to BT module.and Choose Aux from your radio, then you can use your phone to play music through car speakers. You can hear music from your phone/pad/mp3(They should have BT function). BT information : BT 5.0 version, and compatible with 2.0 3.0 4.0 other versions of BT, can support the commonly used MP3 format audio, but also support the WMA WAV FLAC, and other high-quality audio format decoding, non-ordinary BT functions, can support DSD large capacity transmission. Installation method: Red power cable connected to 12V+ Black power cable connected to 12V- BT 5.0 , Support BT 2.0 3.0 4.0 5.0 Compatible for : INA-N333RS/RRS, DVA-7996R, DVA-9860R, DVA-9861Ri, DVA-9965R, CDA-7998R, CDA-9535R, CDA-9830R, CDA-9831R, CDA-9833R, CDA-9847R, CDA-9851R, CDA-9853R, CDA-9855R, CDA-9812RB, CDA-9852RR/RB, CDA-9854R, CDA-9856R, CDA-9857R, CDA-9883R, CDA-9885R, CDA-9887R, CDA-9884R, CDA-9886R, 105Ri CDA, CDA-117Ri IDA-X100 IDA-X200, IDA-X300, iDA-X301, iDA-X303, iDA-X305, IDA-X311, IDA-X313 Specifications: Material Type: ABS Color: black Item Type: BT Car Kit Special Features: car radio BT aux cable Item Size: 23cm Model Name: BT aux cable Packing List: 1Pcs BT adapter