Sima VS-712EX Audio / Video Component Selector (Discontinued by Manufacturer) Digital inputs, outputs, and component video, this unit handles both optical and co-axial digital audio, as well as high bandwith HDTV component video Automatic input sensing, the unit detects the new device, turns on and automatically activiates that input, without the need to push any buttons Automatic volume stabilization Two independent output channels, let's you select one source for viewing (like the DVD) to watch on your TV and a second source for recording to feed to your VCR for recording at the same time Video up converting, this is useful when the home theater has a combination of composite video, s-video, and component video signals