Sennheiser RS 195 Over-Ear wirelesss headphone - rechargeable wireless headphone, up to 100 m range, supports analog and digital audio inputs and allows toggling between the inputs, up to 18 h running time, adjustable left / right balance, over-ear design, closed back, 117 dB @ 1kHz, 3% THD, frequency response: 17 -22000 Hz, includes HDR 195 headphones, TR 195 transmitter, Optical cable, Audio cable, Power supply with 4 adapters (EU, UK, US & AU), weight 340 g