The Pelco MS504LDT Manual Video Switcher is a looping switcher
that provides economical switching of 4 video inputs onto a single
monitor. It comes with additional connectors so that the video inputs
can be looped and terminated in another location too.
looping switcher is meant to be kept on the desktop; however, optional
rack mounting kits are also available. This UL listed manual video
switcher operates at an input voltage of 120VAC.