The usb connection is usually built into the radio to where you can play your videos and other on the ipod. I havnt seen a kit to add just the usb port, the kits usually use the 30 pin connector that works the same way I just put one in my 07 2 days ago and with 30 pin connector and it works just like hooking the usb cable in. Keep looking they are coming out with new stuff every day if it isnt already out.