Sony MDR-RF5000K Wireless digital 2.4GHz RF headphones

.4GHz RF transmission for high quality sound.40mm driver units, closed-type design. Up to 95ft transmission range. CD quality sound.Low noise level. 40mm driver, close-type design. 2.4GHz RF transmission. Up to 95ft transmission range. Neodymium magnets. Auto tuning, power on/off, recharge.