Thomson WHP3001BK Wireless Headphones are specifically engineered to provide maximum convenience, style & comfort with no subsequent sound deterioration, all in a sleek & compact package. Transmitted via radio signal from the charging station to the headphones, sound can be transmitted at a frequency of 863 M Hz to a distance of 100m in open space or 20-30m in buildings, meaning you can move between rooms & still carry the sound with you loud & clear. There is no need to worry about interference with 3 different transmission channels & integrated autotuning (automatic station search) which eliminates any loss of sound or fuzziness as you move around or at distance from the charging station as long as you remain within the maximum range. Powered by 2 x AAA batteries included in the delivery package, the headphones can be switched on & off via their own power button with LED indicator & rest on the charging station when not in use to recharge, a process which can be monitored easily by the integrated charging function/battery charge indicator. When required they can then be removed from the station & worn for extended periods of up to 8h battery life in maximum comfort thanks to the elastic headband & generously padded ear cushions to ensure that your listening pleasure does not turn into unnecessary ear aches & pains! Life really couldnt be easier with the volume control integrated into the headphones so you can adjust the sound to your individual preference without barely lifting a finger, leaving you to enjoy your music wherever & when ever you want. Bliss!