Sennheiser's RS 160 wireless headphones frees you to move about the room while still enjoying the "wired" sound. By pairing exceptional headphones with a compact transmitter (which runs on either AC power or batteries), the RS 160 is a great choice for in-car DVD viewing or rocking around the house while enjoying the up-close-and-personal vibe that you get from good headphones. In fact, you can get up to 60 feet away and still enjoy audiophile quality sound. And there's no fuss when tuning thanks to the automatic (and interference-free) pairing between the headphone and the transmitter. The RS 160 wireless headphones have it all!Sennheiser RS 160 Wireless Headphones Features at a Glance:KLEER uncompressed audio transmission for interference free receptionAudiophile-level transducer systems with powerful neodymium magnets for clear and detailed audio reproductionCompact, portable transmitter - also runs on battery powerMulti-receiver mode- Up to 4 Sennheiser KLEER headphones listening to the same sourceDigital volume control with mute functionLeatherette earpads and headband cushions for outstanding comfortNo complex set-up required - just plug into the analog audio outputs on your audio sourceKLEER technology will not interfere with wireless networks or other 2.4 gHz devicesMulti-country AC wall adapterHeadphone charging cableDetachable audio cable with 1/8 inch connectors(2) AAA NiMH rechargeable batteries2 year warrantyGo wireless with Sennheiser's RS 160 wireless headphones!