Boss Audio HP30 Dual Channel Wireless Infrared Headphones (Sold Individually)

Range-The transmitter from several of our monitors send a high quality stereo signal which can be received by the HP30 wireless infrared headphones. The best sound will be obtained if you sit directly in front of the monitor, within 1.8metres. If you choose to sit on either side of the monitor you can expect the same great reception within 35 degrees to the left or the right of the monitor.
 
Dual Channel-The HP30 has the ability receive two separate signals from two separate video units. Say you have a couple of passengers who want to see their own videos. One flips to channel A and views/listens to one unit, while the second flips to channel B and views/listens to another video. You can also pick up both channels A and B with just one pair of headphones.
 
Specifications
•Transmission system: Infrared light
•Carrier frequencies: 2.3/3.2MHz (left channel) – 2.8/3.8MHz (right channel)
•Distortion: Less than 1%
•S/N ratio: Greater than 60 dB
•Channel separation: Greater than 40 dB
•Frequency response: 30Hz – 20KHz
•Power source: 2 x AAA batteries
•Current consumption: 25 mA max (during play) / 15 mA (muted)