(1) Compatible with other versions of 2.0 3.0 4.0 Bluetooth system, supports commonly used MP3 format audio, also supports WMA WAV FLAC and other high-quality audio format decoding, non-common Bluetooth function, can support DSD high-capacity transmission.(2) Simply plug the 12-pin plug into the socket on the back of the radio, connect the red wire to 12V+ and the black wire to 12V-.(3) Match your cell phone or keyboard to the Bluetooth module. Then select Aux from the radio and you can use your cell phone to through the car speakers.Wireless version:5.0Product voltage:5-12VFitment.For 207 2006 + for /VDO/for RD4For 307 2005 + for /VDO/for RD4For 307SW 2005 + for /VDO/for RD4For 307CC 2004 + for /VDO/for RD4For 2007 + for /VDO/for RD4For 407 2005 + for /VDO/for RD4For 407SW 2005 + for /VDO/for RD4For 607 2005 + for /VDO/for RD4For 807 2005 + for /VDO/for RD4For 1007 2005 + for /VDO/for RD4For 4007 2007 + for /VDO/for RD4Colour:BlackMaterial:PlasticPackage Contents:1 * Bluetooth AdapterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.