The Sabrent PC to TV converter transmits the VGA video signal from your PC or MAC to a TV, by connecting to either the composite port or S-video port on the TV. Simply plug one end of this adapter into your computer and the other end into your television and you can display your computer applications on your TV. This is great way to add a second display to your computer, or even to connect your PC with Karaoke music/video files to a TV. You can use your PC speakers, or you can get a 3.5mm to RCA audio cable to deliver sound to your TV.