BZBGear BG-MV41A 4x1 1080p HDMI Switcher, Scaler and Multiviewer

The BG-MV41A takes four HDMI sources to a single HDMI output and lets you show them together in a quad multiview or switch between them full screen. Switching is seamless, and the built-in scaler upscales 720p to 1080p and downscales 1080p to 720p so mismatched sources do not fight over the output format. Five display modes cover the usual jobs, from a four-up security wall to a single presenter feed.

Operation is straightforward: front-panel buttons select the layout and the active source, and a separate audio button picks which input's audio goes to the output. For a rack or a lectern out of reach, the unit answers to the supplied IR remote or to RS-232, and RS-232 passthrough is available. The chassis is metal, the supply is a locking connector, and maximum draw is 10 W.