GROM-AND2 Android Car Link adapter connects your Android phone to the stock stereo in your car. With GROM-AND2 Android Car Link you can listen to your digital music library and control the playback through your car stereo controls or from the Android phone directly. In addition you will charge your phone while in car. USB Drive Input: You can also connect USB 2.0 mass storage device such as external hard drive or flash thumb drive to the USB port of GROM-AND2 Android Car Link. Then you will be able to listen to your USB digital music and control the playback through the car stereo or stereing wheel controls. The USB drive will be your virtual CD changer. AUX 3.5mm Input: You will get AUX-IN connection for any additional audio source such as DVD, MP3 player, XM and more with AUX-In cable included.