This wireless headphone system is made up of a pair of wireless headphones (HDR 170) and a multi-purpose transmitter (TX 170), which also functions as an easy-charge cradle and docking station. The RS 170 also features a Dynamic Bass Boost and Surround Sound simulation mode for edge-of-your-seat excitement with your favorite music and movies. The RS 170 system utilizes KLEER’s uncompressed digital wireless audio transmission, offering a range of up to 260’, 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. An exceptionally detailed, full-bodied sound reproduction is pumped into the listener’s ears, filling the sealed, private earcups with liquid smooth audio. The headphones’ leatherette earpads and headband cushions deliver outstanding comfort while their closed, around-the-ear design prevents sound leakage.