Koss JR900S

No other RF stereophone system on the market delivers the exceptional sound reproduction and extended frequency response of the JR900 stereophones. Neodymium iron boron magnet structures and mylar diaphragms only 16 microns thick deliver crisp highs and amazing bass response. Oxygen-free copper voice coils transmit the clearest signal possible in a dynamic stereophone. The JR900S has a frequency response of 20-20,000Hz to deliver the deep bass and treble clarity known as the Sound of Koss. Circumaural leatherette ear cushions enclose the ear for maximum isolation and deep bass. An adjustable, padded, vinyl-covered headband fits any head size and shape for the most comfort during extended listening. A dual volume control on the stereophone ear cup provides convenient level and balance adjustment for a customized sound. A microchip in the stereophone circuit automatically locks the transmitter signal onto the selected channel to prevent drift between audio sources. When not in use, the JR900S uses integral NiCad batteries that provide 5-10 hours of use between rechargings. A battery recharge circuit is built into the transmitter so recharging is hassle free.