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The 4 in 1 car kit for iPod and iPod mini is a lightweight portable charger for users. Digital wireless radio transmitter wirelessly connects portable music players to your car quickly and easily. Just plug the FM transmitter into the dock connector of your iPod or the headphone jack or any audio source including your PDA, mp3, CD, or cassette player. Tune your car radio to the clearest FM frequency, and enjoy your digital music with full stereo sound and convenience.