Sennheiser Consumer Audio Sennheiser HDR 120 Accessory RF Wireless Headphone for RS 120 System

Please note – for the HDR 120 to function it must be used in conjunction with the RS 110, RS 120 or RS 135 Wireless headphone system. Frequency response 22 - 19500 hertz Features: * Sennheiser HDR 120 Headphones, Extra Wireless Headphones for RS110 and 120 Systems (charger not included) * Open, stereo, supraaural, wireless RF headphone. * Detailed, analytical sound reproduction with strong bass response. Suitable for all types of modern music and TV applications. * Wireless freedom with reception through walls and ceilings. * Very lightweight headphones, extremely comfortable to wear. * Impedance - 24 Ohms