VS-33V 3x1 Vertical Interval Video Switcher 

The Kramer VS-33V is a high quality 3x1 vertical interval switcher for composite video sources using BNC connectors. It is designed to route up to three composite video signals to a single monitor, projector or other receiving device. Since switching is performed during the vertical interval, transitions are glitch-free when sources share  a common reference sync. The VS-33V is housed in a very compact enclosure, but up to three units can be rack mounted using Kramer’s model RK-SM rack adapter kit. An external 12VDC power supply is included for typical operation but can also be powered by the optional VA-50P which can power up to six Kramer products requiring 12VDC.