Digital Lifestyle Outfitters DLA57878/17  TransDock micro FM Transmitter / Charger with IntelliTune for Zune (Black/Silver) TransDock Micro sends the strongest signal possible to your car's FM radio. IntelliTune technology: In one click, IntelliTune automatically finds the best frequency to play your Zune over your car's FM radio. Stay in charge: Charge your Zune from any auto power outlet so you arrive at your destination with your Zune fully charged. Compatible with Zune HD 16, 32; Zune 4GB, 8GB, 16GB, 30 GB, 80GB, 120GB. Protective silicone resists corrosion and improves grip.