The SE-500KIT Video Mixer Kit from Datavideo is four-input analog switcher with quad-split preview. The LCD monitor rack includes red, yellow, and green tally lights to indicate program, preview, and other sources, as well as next selected effect. The operator can use one monitor to observe all sources and the other monitor to select video effects before broadcast.
It also includes a small audio mixer with (2) line-level unbalanced inputs and (2) microphone inputs. The front panel additionally features a headphone jack and volume control. Remote control units include both MIDI and RS-232, allowing you to manage the system with a keyboard or computer.