The SE-500 is a small, analog four input switcher with a quad split preview output. It includes red, yellow, and green tally markers to indicate the program, preview and other sources as well as the next selected effect. And there is a button that will cause the preview display to show the next selected effect.
The SE-500 Kit comes with a TLM-702 dual-monitor bank and a monitor holder that places the TLM-702 right above the switcher. It is also available as a Hand-carried Studio (HS-500), perfect for mobile purposes.