Kramer Electronics 4x1VB 4x1 Composite Video Mechanical Switcher Kramer 4x1VB 4x1 Composite Video Mechanical Switcher - Mounting Bracket - Kramer 7 Years Limited Warranty High Bandwidth - 400MHz (-3dB) Video on BNC Connectors - 4x1V has RCA connectors Mechanical (Passive) Switching - No power required Compact Kramer TOOLS - 3 units can be rack mounted side-by-side in a 1U rack space with the optional RK-3T rack adapter