The Sennheiser RS 160 Binaural Headphones for superb Sennheiser stereo sound.
The RS 160 is a two-part system that comes with wireless headphones, powered by a couple of NiMH batteries, and a transmitter that connects to your output device.

This compact and portable transmitter utilizes Kleer's uncompressed digital wireless audio transmission. It offers an effective range of 20m (line of sight), and can serve up to four pairs of headphones. Soundwise, the bass delivery is rousing and full-bodied while the closed, snug fit around your ears effectively isolates outside noise.

Features:

Closed, circumaural digital wireless headphones

Superb Sennheiser stereo sound

Digital volume control with mute function

Dynamic transducer systems with neodymium magnets provide clear, detailed audio with a wide frequency response

Dimensions: 9" L x 4.4" W x 9" H