Go wireless in your classroom with plug-and-play simplicity. Connect the wireless transmitter to any analog audio source through 1/8" stereo mini plug and transmit audio via dedicated FM signal, up to 300 feet, to a nearly unlimited number of wireless headphones. With 4 different color-coded frequencies, you can easily switch between them and with additional transmitters you can have up to 4 different channels of audio broadcasting simultaneously! You'll get everything you need with this system, including one wireless transmitter, 12 wireless headphones and a lockable case to carry and store your listening center. It's the perfect solution for all multimedia labs and classrooms. This 12-Station Wireless Listening Center