Wireless Fm Transmitter + Car Charger for Mp3/ipod Car mp3 transmiter X 1 Car Charger X 1 This unit can also operate with AA battery alone. This FM Transmitter is the perfect way to get sound from your iPod, PDA, MP3 into your car. Frequency Channel : 106.7MHz, 107.1MHz, 107.5MHz & 107.9MHz