Upstairs, downstairs and everywhere in between, the Acoustic Research AWD209 wireless 2.1 headphone lets you enjoy crisp, clear sound reproduced with outstanding depth, sonnance, definition, and absolute freedom from wires. Sound is delivered through integrated multi-chamber speakers. Their light weight and comfortable design is softly padded to conform to the shape of your ears. Watch TV, listen to music and game in a whole new way. 2.4GHz RF digital technology makes it virtually interference free and maintains flawless CD quality reception through walls, floors, and ceilings up to 100 feet.