MyGIG radio/navigation units are not capable of streaming audio through the USB port (except for the RHR). 


The USB ports are for charging devices, as well as reading data such as music or pictures, and copying them to the hard drive


With some units, software updates can also be loaded onto a USB drive and applied to the radio/nav unit.

 

Bluetooth wireless streaming is possible on many units, if you pair your device with the radio/nav unit.