The DICE I-VW-T (w/out Ext) is the Direct Connection iPod Vehicle Adapter that is fully compatible your vehicle Radio. The DICE I-VW-T (w/out Ext) connects directly to the back of the factory radio, giving you CD Quality Sound from your iPod in the car. In addition, the DICE I-VW-T (w/out Ext) powers and charges the iPod or iPhone and lets you browse the iPod using the radio and steering wheel controls controls. There is an additional AUX input that will let you connect any other device that has an audio output, portable satelite radio receivers, microsoft zune, and the iPod shuffle. FM Transmitters and Cassette adapters cannot compete with the CD Quality Sound of this Direct Connection iPod Adapter.