Make the TV as loud as you need it without disturbing others. Transmits on 95KHz frequency, compatible with most theaters using infrared technology. Works on any TV, including plasma with three times the power of the TV Ears original. Amplifies up to 120dB with proprietary Voice Enhancement Technology to clarify TV dialogue. Also has Automatic Commercial Control to cap loud commercials so you don’t get blasted with volume. Has adjustable volume, tone and balance controls. A quick charge battery charge system recharges the battery in the headset in one hour. Two headsets can be charged at once. Transmitter connects to TV audio out jacks, or you can use the external microphone to pick up the sound from the speakers. Headset has a direct connect audio jack on it that has many uses. A neckloop (not included) can be plugged in to use the headset with your hearing aid telecoils. System comes with: a Voice Cord with microphone to use the headset as a personal listing device; a Music Cord to connect to MP3 players and other audio devices; a Cell Phone cord that lets you use your headset as a hands-free cell phone headset. No other TV listener is this versatile. One year warranty.