4x1 4k Hdmi Quad Multi-viewer With 4k Input And 4k Output With Pop Pip And Kvm Switch Functions - Channel Video Multiplexer - AliExpress
XQ-CEA-0161US, 4K HDMI Multi-Viewer, 4 in 1 Out HDMI Screen Switch with 5 Modes, Support 4K@30Hz/2K@60Hz Seamless Switch for Game Studio, Exhibition Hall, Video Meeting, Surveillance, Display Mall etc., Iseebiz
Avenview 4 x 1 HDMI Quad Multi-Viewer with 4K HDM-SPLITPRO-4K
4K 8X1 HDMI Multi-viewer Screen Splitter Real Time Multiviewer Seamless Switch | eBay