Sennheiser RS 175 TV Wireless Headphones. RS175

Closed, circumaural headphones Transmission range of up to 328ft/100m Multi-purpose transmitter Multi-receiver transmission Supports analog and digital audio inputs Intelligently designed controls Enables switching between dynamic bass & virtual surround sound Ergonomic design Frequency response: 17 – 22,000 Hz Max. sound pressure level: 114 dB at 1kHz, 3% THD THD, total harmonic distortion: 90 dBA Modulation: 8-FSK Digital Carrier frequencies: 2.4 – 2.48 GHz HDR 175 headphones: Yes TR 175 transmitter: Yes Optical cable: Yes Audio cable: Yes Power supply with 4 adapters (EU, UK, US & AU): Yes 2 AAA NiMH rechargeable batteries: Yes Quick guide & Instruction manual CD: Yes