Sennheiser  Remanufactured  RS-45 Wireless RF Headphones Pair of wireless hi-fi stereo headphones for cord-free listening Powerful FM transmitter broadcasts through walls and ceilings Extended 20 Hz to 20 kHz frequency response delivers rich, warm audio Soft, cloth-covered earpads and headband; automatic tuning Remanufactured to like-new condition; 2-year warranty