The RS 180 wireless headphone system delivers superior sound yet to be seen in wireless headphones. The entire package includes headphones (HDR 180) and a multi-purpose transmitter (TX 180) that also functions as an easy-charge cradle and docking station. The RS 180 make movie and HDTV marathons an amazing experience thanks to the Automatic Level Control, which compensates for variances in the volume of program material to enhance speech intelligibility. The RS 180 utilize KLEER’s uncompressed digital wireless audio transmission, offering a range of up to 320’, audiophile-grade sound and reception to 4 optional pairs of Sennheiser KLEER headphones. Never fuss with tuning again thanks to automatic, interference-free pairing between the headphone and transmitter. The Open-Aire speaker system puts you in the action by delivering the most natural sounding private wireless audio experience possible. It even includes a balance control for the ultimate in listening experience customization. The headphones’ luxurious velour earpads and headband cushions provide exceptional comfort for hours on end.