Serene TVDirect TV Listening Headset System Model TV-100 Its Wireless, Rests naturally and gently on your shoulders so you can listen in private, in un-matched comfort and with freedom of movement Light weight and comfortable to wear; it feels like you're not wearing anything. Automatic Volume Control eliminates sudden blasts of loud noises and commercials. Input jack to listen to movies on plane, iPod, and other audio sources Dual charging Bays for two separate receivers. (One included; extra receiver sold separately)