Clarion's WH-204 dual source wireless headphone system includes two wireless stereo headphone sets and an IR transmitter with two sets of audio inputs. Why two inputs? It accepts audio output from two different audio/video sources (like a DVD player and video game system), so two people can listen to separate audio tracks on the wireless headphones at the same time!
Each headphone set has an A/B source selector switch and volume control, so each user can select their own volume level and audio source. Each headphone set requires two "AAA" batteries (not included). An Auto ON/OFF microswitch in the earcups saves battery power by turning on the headsets only when audio is playing.
Important Note: The headphones are for passenger use only. Most states prohibit the use of headphones by the driver while operating the vehicle.