Alpine designed the SHS-N205 wireless headphones to work with the SHS-N252 wireless headphone system. If you have to entertain more than two passengers, pick up these headphones so all the folks in the back can enjoy private listening. These headphones are also compatible with mobile overhead monitors & headrest screens. This fold-flat headphone features the same earcup volume & source selection controls as those that come with the SHS-N252 system Overview: The Alpine SHS-N205 is an additional single source IR wireless headphone for use with Alpines SHS-N252 dual source wireless headphone & transmitter kit. The SHS-N205 IR headphone features & adjustable headband & on-the-ear padded earcups. IR Sensors: Each earcup on the headphone features a side mounted IR sensor to communicate with your compatible Alpine dual source wireless transmitter kit. Controls: The headphones right earcup features a volume dial, a power button, an A/B source switch & a