The Sennheiser RS160 wireless headphones from Sennheiser allow you to enjoy full uncompressed CD-quality audio without the hassles of wires. The system includes a pair of around-ear headphones and a compact transmitter that lets you enjoy your audio. The transmitter connects to your CD player, computer, home theater, or other audio devices. It uses KLEER wireless technology to send uncompressed digital audio up to 60' to the headphones. KLEER technology provides automatic, interference-free pairing between the transmitter and the headphones, so there's no need for tuning. The transmitter can operate on batteries or AC power for terrific versatility.