Sony MDR-RF811RK

40mm driver unit, closed type, 100m range, AC power adaptor Rechargeable wireless headphones with 100m listening range<br/>
<br/>40mm driver: Hi-Fi quality digital sound for home, with powerful 40mm Neodymium driver unit and long stroke diaphragm for deep clear bass.<br/>
RF wireless: Radio Frequency transmission technology offering a huge 100m listening range.<br/>
Cordless style: Closed type headphones with wireless connectivity and built-in volume control for the ultimate freedom to listen around the house.<br/>
Easy set up: Tune and go: Automatic tuning and on/off switch, plus comes with all the cables you need to plug into your TV.<br/>
Simple connectivity: Stereo mini plug easily connects your headphones to TV and audio devices around the home.<br/>
Lightweight and long-lasting comfort: Weighing just 270g and designed for long-lasting wearing comfort with parallel-link self-adjusting headband plus padded circum-aural ear cushions.<br/>