Cellular Innovations Tune Free FM Transmitter for MP3 Players Compatible with all iPod models Plays music from any portable fm-equipped Audio device Wirelessly transmits Audio on FM frequencies Tune-free transmitter plugs into Audio device Users can set the transmitter & a stereo to the same FM frequency (88.1Mhz-107.9MHz) Works with all ipods , plays music from any portable fm-equipped audio device, wirelessly transmits audio on fm frequencies, Tune-free transmitter plugs into audio device, set the transmitter & a stereo to the same fm frequency 9.84-FT Operating range, up to 15 hours of operating time, standby time: 45 days, requires 2 aa batteries, 1-year war