The 4x1VB is a high-performance switcher for composite video signals. It switches any one of four signals to a single output. High Bandwidth – 400MHz (-3dB). Video on BNC Connectors. Mechanical (Passive) Switching – No power required. Si…ze – Compact TOOLS – 3 units can be rack mounted side-by-side in a 1U rack space with the optional RK-3T rack adapter. Applications: Presentation and display systems. CCTV and home theater applications. Rental and staging applications. Also compatible with SDI and any other high frequency signals. Product Features:With this video switchbox, avoid constantly moving cables around between sourcesTrouble free connection with computerConnect single display to 4 sources