TV 2500 Wireless amplified digital stereo headset for use with TV, HiFi and many music players. Up to 120dB volume booster. Tone and balance adjustment. High quality of sound and optimal comfort for long term use. Supplied with rechargeable batteries. With Optical input (Toslink), 2.4 GHz Wireless Stereo. Transmission through walls or ceilings. Easy plug-and-play connection.