Many Universities have purchased this package with grants in order to study wildlife in different ways. We offer a number of systems that are labeled with SSC-773. They can all basically be used for the same purpose. The main differences are the size/amperage of batteries and the quality or model of camera included. The SSC-773WL2 version advertised on this page is comes with an outdoor weatherproof camera with night vision. The LEDs in the camera are 940nm which means they are virtually invisible at night. The WL2 model has our biggest batteries comes with a heavy duty rugged custom made 50 ft power video cable. Please contact us if you require a longer power video cable.