The RS 2000 TV amplifying system uses cutting-edge digital, wireless RF technology to provide Sennheiser’s superior sound quality. The comfortable, ultralight stetho-style headphone has adjustable left/right volume controls for a pleasant and balanced sound. Without having restricting cables, the wireless RS 2000 gives you listening freedom to move about within a range of up to 150 ft. Connects to TV or any audio device using the analog input. The base station serves as a docking station and charges the durable integrated battery for up to 9 hours of operation on a full complete charge.