Griffin Technology 4030-ROAD RoadTrip FM Transmitter and Auto Charger and Cradle for iPod Plugs into any auto power outlet or lighter adapter Transmitter can be removed and used with a Mac or PC computer Convenient one-piece transmitter and charger module uses any frequency from 87.7 to 107.9 MHz Compatibility: iPod nano (1G only), iPod mini, iPod 3G, iPod 4G with click wheel, iPod color, iPod video Backlit screen shows which frequency RoadTrip is currently broadcasting Compatibility: iPod nano (1G only), iPod mini, iPod 3G, iPod 4G with click wheel, iPod color, iPod video Convenient one-piece transmitter and charger module uses any frequency from 87.7 to 107.9 MHz Backlit screen shows which frequency RoadTrip is currently broadcasting Transmitter can be removed and used with a Mac or PC computer Plugs into any auto power outlet or lighter adapter