Great headphone sound goes wireless
Sennheiser's RS 180 wireless headphones let you enjoy superb sound that won't disturb family members or housemates. Advanced "Open-Aire" speaker technology delivers clear, natural-sounding detail, while the Automatic Level Control smooths out variances in volume — quiet dialog is easier to hear, and loud commercials and explosions are kept in check. The luxurious velour earpads sit around your ears to seal out external noise. And with a listening range of up to 320 feet, you can roam freely throughout your living area — make popcorn during TV commercials, look through a photo album in another room, or stay up for a late-night listening session while your spouse sleeps soundly next to you.
Exceptionally "Kleer™" wireless technology
The RS 180s use Kleer wireless technology to deliver uncompressed stereo sound. Unlike other wireless technologies, Kleer delivers lossless, CD-quality digital audio, which means you won't be able to tell the difference between these headphones and your wired ones. Multi-receiver mode allows up to four people using Sennheiser Kleer headphones to listen to the same audio source, so you can easily share music, movies, or TV shows with your friends and family. (Add-on HDR 180 headsets available separately.)
Never misplace your headphones with the multi-purpose transmitter
The multi-purpose transmitter keeps your headphones charged up and ready to go. It also doubles as a docking station, so you'll never forget where you put them. Wireless setup is easy — just connect the transmitter to a spare headphone jack or RCA audio output using the included cable. Then plug the transmitter into an AC power outlet. Automatic tuning does the rest, pairing with the headphones for interference-free sound.
From the review Sennheiser RS 180 wireless headphones -- wi-fidelity
"The big story, though, was the sound quality. The RS 180 transmitter sends an uncompressed 2.4GHz audio signal to the headphones, so the sound I was getting was robust and full. Of course, different sound sources have different qualities. When I listened to an Internet radio station with a compressed 128Kpbs stream, it didn't sound as good over the 'phones as the Apple Lossless tracks streamed from my music library. But relatively speaking, the radio stream still had a fair amount of sonic detail and presence."
— Ralph, Crutchfield Blog Editor and A/V Writer