Item Type: Bluetooth Audio Cable Material: ABS and metal Bluetooth Version: 4.0, compatible with 2.0 3.0 4.0 other versions of Bluetooth, can support the commonly used MP3 format audio, but also support the WMA WAV FLAC, and other high-quality audio format decoding, non-ordinary Bluetooth functions, can support DSD large capacity transmission. Fitment: Replacement for A3 TT A4 S4 A6 A8 A8L 2007?2014 Package List 1 x Bluetooth Audio Cable 1Perfect Fitment: Audio aux cable is replacement for A3 TT A4 S4 A6 A8 A8L 2007?2014, perfect matching your car, has a long service time. 2Premium Material: Aux cable adapter is made of high quality ABS and metal material, rustproof, wear resistant, high toughness and durable. 3Bluetooth 4.0: Adopt bluetooth 4.0 version, and compatible with 2.0 3.0 4.0 other versions, can support DSD large capacity transmission. 4Function: Wireless audio adapter can support the commonly used MP3 format audio, but also support the WMA WAV FLAC, and other audio format decoding. 5Easy Installation: Easy to install, no modification is required, just plug and play, red wire connected to 12V+, black wire connected to 12V?.