The rr features. It locks up everytime you try to make a live change. The car will run off the rr pcm but as soon as you try to make a change I get a usb error and it just freezes up. I have to unplug the usb to get the screen to unfreeze. I have spoke to Craig about it already and everything he suggested. Im going to try a usb hub tomorrow and see if that does anything. I can't the wireless option to work either so Im starting to think its something in the plug in rr.