Wireless Fm Transmitter for iPod, Nano, Video, Mini MP3, MP4 Turns your FM stereo into an MP3 broadcaster. Comes with clock and thermometer functions Program up to four station presets; automatically turns on and off Operating range of up to 30 feet; transmits on FM channels 88.1MHz-107.9Mz Mobile Power Cord connects to car's cigarette lighter port for optional battery-free operation Universal accessory for all digital audio players compatible with 3.5mm mini-jack