Specification: Type: Adapter/Converter Compatible Model: Universal Color: black Material: PVC copper Product plug: usb 2.0 female audio 3.5mm male Product line diameter: od3.5mm Product instructions: Ordinary car audio 3.5MM AUX interface is not MP3 audio decoding playback function, so can not use this data line, only with MP3 audio decoding playback function of the car GPS, CD, DVD audio can use this data line. The line 3.5MM plug connected to the car GPS, CD, DVD audio 3.5MM AUX audio interface, the other USB plug in the USB disk to achieve the car to play U disk songs. Package Contain: 1x 3.5mm Male AUX Audio Plug Jack To USB 2.0 Female Converter Extention Cable