The Kensington RDS FM Transmitter/Car Charger is the neatest way to integrate an iPod into your car and get a remote display. It transmits music through an FM modulator, but also shows artist and song information on your car's radio display, provided you have an RDS (radio data system) radio. Kensington managed to reduce the static common to FM modulators, though not totally.
As with generic FM modulators costing $15 to $50, the RDS FM Transmitter/Car Charger sends music information to your car's radio antenna and broadcasts it over an unused FM frequency. Kensington says its ClearFM technology "reduces noise and enhances stereo separation." But "reduces," as we found out, is a far cry from "eliminates." The majority of cars sold today have RDS receivers, which allows the radio station to broadcast and display its call letters, artist and song information, and unfortunately, the occasional ad. Kensington uses RDS to display artist name and song name information on the radio display, though you see only eight letters at a time