Acoustic Research AR AW-771 900 MHz Wireless stereo Surround Sound Headphones works great
Description

Acoustic Research (AR) Surround Sound Headphones expand and enhance the enjoyment of your home theater equipment. Today's movies and concert DVD's are recorded with five-channel audio positioning to provide the most realistic atmosphere for a completely immersive movie or music experience. Surround Sound places the listener in the middle of the action while watching a movie, or in front of the stage while listening to a concert. AR's Surround Sound Headphones provide an acoustic environment that is virtually identical to that of a movie theater or live musical performance. AR's Surround Sound Headphones are compatible with most digital and analog audio/video equipment, i.e., DVD players, TV, VCRs, and home theater receivers.
Virtual Surround Sound – 5.1 “Channels” Through Headphones. AR’s Surround Sound Wireless Headphones incorporate a Dolby Digital processor and Surround Sound headphone technology to create an acoustic environment that is virtually identical to that of a movie theater or a live musical performance.

AR’s 900MHz Wireless Advantage. AR’s new, patented 900MHz technology achieves a greater than 70dB signal-to-noise ratio, allowing the headphones to deliver an ultra-quiet performance. The “silence” is essential in conveying the full impact of movie soundtracks – including subtle background effects – that can be presented with the most accurate imaging and realism.

Comfort and Convenience by Design. Designed for the ultimate in extended-wear comfort, these headphones feature angles, swiveling earcups and self-adjusting headband to achieve the best possible fit. Oversized ear pads gently cushion the outer ears for the continuous wearing ease that is essential when watching a long movie.


Features

Enjoy a theater-like acoustic environment through a pair of wireless headphones
Highest-quality sound reproduction with deep, powerful bass and clearly defined highs
Patented, ultra-quiet 900MHz technology allows signal to travel through walls, floors and ceilings up to 300 ft.
Accurate push-button auto tuning
Surround Sound ON/OFF switch to alternate between watching a movie and listening to music
Input Select allows switching between three different audio/video components
Channel Select permits the operation of more than one 900MHz product within the same area
Angled, swiveling ear-cups and self-adjusting headband for best possible fit and comfort
Ni-MH rechargeable batteries provide more than four hours of use at one time
Specifications:
Headphones:
Push-button tuning
40mm titanium-impregnated elements with neodymium magnets
Frequency response: 20Hz - 20kHz
Transmitter:
Signal-to-Noise ratio: >70dB
Stereo separation: >35dB
Dolby Digital processor
Virtual Surround Sound headphone technology
Effective transmitting range: 300 feet (range may vary according to environment)
Three separate transmission channels
20 bit ADC/DAC
Optical input connector conforms to EIAJ standard CD-1201
Compatible digital audio sampling rates: 32K, 44.1K, 48K samples/second
Dolby Digital in IEC 1937 format (formerly IEC 958 Annex B) as specified in ATSC A/52 Annex B
PCMin AES/EBU format
Included Inside:
3-foot premium digital optical cable with Toslink® connectors
12V DC  power supply


Technical Specifications

Product Type - Headphones
Recommended Use - Home audio system
Additional Features - Volume control
Localization - English
Headphones Type - Headphones - binaural
Headphones Form Factor - Ear-cup
Headphones Technology - Dynamic
Connectivity Technology - Wireless - radio
Sound Output Mode - Surround Sound
Response Bandwidth - 20 - 20000 Hz
Signal-To-Noise Ratio - 70 dB
Diaphragm - 1.6 in
Magnet Material - Neodymium
Radio Frequency Range - 900MHz
Radio Channel Qty - 3
Transmission Range - 300 ft
Connector Type - 1 x SPDIF input ( TOS Link ) ¦ 1 x SPDIF input ( RCA phono ) ¦ 1 x audio line-in ( RCA phono x 2 ) ¦
1 x DC power input
Cables Included - 1 x audio (optical) cable - 3 ft
Power Device - Power adapter + battery charger - external
Battery - 3 x battery - AAA type
 

In used works well condition. Might have some scratches.

tested.

Following is for reference only: