Connects best to Analog TVs - for Digital TVs, look for TV Ears Digital Headset System. The Original Wireless Headset System works with TVs Equipped with 3.5 or RCA Audio Out Ports. Voice Clarifying Circuitry with twice the Power at 120 db. Connects wirelessly to your analog TV using infrared technology so please ensure there is no interference in the line of sight of the transmitter to keep your signal strong. Television and headset volume function separately so you can turn up your headset volume while others mute or set the television volume to their preferred level. The Audio Frequency Response is 20 - 20,000 Hz.