Rear Seat Entertainment System (RSE), Generation 3.1/3.2 (75TH Anniversary Edition; 2002): Design: Headphones
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
The wireless IR headphones are compatible with both screens. IR transfer is used to transfer standard audio to the headphones in two-channel stereo format. The headphones are powered by internal batteries. The headphones are switched on with a button on one side while the volume of the respective headphones is adjusted with a wheel. Each set also has a channel selector that controls which audio source the set of headphones receives.