The Sennheiser RS 175 is the right complement to your home entertainment system. This digital wireless headphone delivers sound quality and freedom from wires. The ergonomic around ear, closed back design reduces background noise while providing an comfortable fit. Sennheiser recommends this headphone for anyone wanting to enjoy music, movies or tv programs without wires or making a sound. Digital wireless audio transmission -delivers sound quality over its 330 ft (line of sight) operating range. Never again worry about the tangled limitations that are inherent with wired headphones. Leatherette ear pieces. Adjustable headband. Bass control. 80m range. Rechargeable battery (included) . Model number: 505563. Manufacturers 2 year guarantee.