Entertainment Receiver : This receiver was designed so you could transmit video and stereo sound from a DVD or MP3 player (whether external or PC-based), or even a Broadband Video Download via the Net, to any TV or stereo system in your home. Works great with Entertainment Anywhere, DVD Anywhere, or MP3 Anywhere. If you're looking to expand your system so you can transmit your Movies to multiple TV's at the same time, then this is the proper Video Receiver.- Download Manual
 

Camera Audio/Video Receiver : Inside each XCam2 Camera is a tiny microphone. When you add this receiver to your system you'll be able transmit your  Camera VIDEO Images and AUDIO to multiple TV's or hook up XRay Vision or MultiView so you can view your LIVE video on your TV and PC at the same time -- no more need to move the receiver to your office when you want to view your cameras on your PC. This receiver has one jack for audio input, which means you'll receive audio in mono, not stereo. (see photo) - Download Manual

Camera "Video-Only" Receiver : This NEW Tiny Receiver is 1/2 the size of the larger VR31A. Because it's much thinner and shorter its a lot easier to place behind books, 
the TV, or next to your PC! When you add this receiver to your system you'll be able transmit your Camera VIDEO Images  to multiple TV's or hook up XRay Vision or MultiView so you can view your LIVE video on your TV and PC at the same time -- no more need to move the receiver to your office when you want to view your cameras on your PC. Also, since audio is not available in PC-based applications, this Receiver is recommend for those applications. Download Manual