The VS8x1 is a eight input, dual output vertical interval video switcher. Specifications are the same as Model VS4x1. Second output to drive monitor, etc. The VS8x1R is RS232 controlled via PC. A proprietary cable/adapter interface is included to allow connection between the switcher and your PC. Any terminal emulator (i.e.. Windows HyperTerminal, ProComm) is all that is required to communicate with the switcher. The VS8x1RC uses the RC8x1 Remote Controller. A cabling kit and wiring diagram is included so the end-user/installer can create an interface of up to 25 feet. Red, Green and Orange colored filters are also included for the illuminated pushbuttons of the RC8x1.The RC8x1 is a remote control unit for the VS8x1RC. Illuminated switches with brightness control. The RC8x1 derives its power from the VS8x1RC.