this cable can let you play music through usb flash with your aux socket in your car. features: 1. 100% and high quality 2. connector : usb female connect the u-disk, can read the mp3u-disk 3. jack :3.5mm stereo audio plug in the car aux port 4. length : about 20cmapprox note: 1.not all the car with this interface can use this kind of cable. some car aux without decoding function,so can only use mp3 device,only car aux interface have the function of read u disk can use this kind of cable 2.when using, u disk had better not store too much, specific to the car aux can support how much capacity.u disk can not have other documents inside and do not establish folder.mp3 format music is used. 3. it is not a charger cable. package included 1 x 3.5mm male to usb female cable