Nostalgic necomimi: a device that moves with brain waves. This is not headphones or a headset. It seems to be a battery-operated type, not USB rechargeable. (Batteries not included) The rubber parts are sticky due to aging, so I think it would be difficult to use practically. I confirmed the operation more than 10 years ago when I received it new, and it has been stored at home for a long time in its box, so I recommend using it as interior decoration. necomimi Please purchase after fully understanding the following: * Please refrain from purchasing if you are nervous, as it has been stored at home for a long time. * There are many stains and scratches due to aging. * The outer box has discoloration, stains, and tears. * Please judge the condition from the photos and purchase only if you are satisfied. * All accessories are shown in the photos. They may differ from when new. * We will ship it as is, without excessive packaging or cleaning. * Purchase for interior decoration or collection purposes, as it is highly likely that it will not work.