SOUNDFEEDER WIRELESS STEREO MUSIC ADAPTE Wireless FM transmitter compatible with portable CD players, iPods, and MP3 players Plugs into audio device's 3.5 mm headphone jack and transmits to empty FM frequency Supports blank FM stations between 88.1 and 95.9 MHz Runs for up to 60 hours on 2 AAA batteries; 10- to 20-foot transmission range Measures 3.38 by 1.62 by 0.88 inches (W x H x D) and weighs 1.3 ounces