Sennheiser RS 175 Wireless TV Headphones The Sennheiser RS 175 Digital Wireless headphone system consists of a pair of wireless headphones (HDR 175) and a radio frequency (RF) transmitter (TR 175). The system is designed to enhance the sound of your TV or your home audio source, and to give you the freedom to walk around your home with the headphones on. Hear crystal clear dialogue and special effects - without disturbing family members. The Sennheiser RS 175 headphone system puts you in the mid