HDMI Multiviewer Switch 4x1,ESTONE HDMI Quad Multi-Viewer Seamless Switcher 4 in 1 Out with Audio Switch,4K,5 Viewing Modes for Security Camera, Gaming Consoles (Multiviewer up to 4K@60Hz) - Newegg.com
HDMI Multiviewer Switch, 4-Port, Built-in IR | Eaton
AV Access 4x1 4K HDMI Multiviewer, Seamless Quad-View HDMI Switch
Amazon.com: 4K HDMI Multiviewer Switch 4x2 with PIP, PORTTA Quad Multi Viewer Seamless Switcher 4 in 2 Out with Toslink, 3.5mm Audio Output Support 4K 30Hz, 6 Viewing Modes, Downscaler for PS4/PC/DVD :
1080p 4x1 HDMI Multi-Viewer (QuadView)
Looking for an HDMI multiviewer that has good layout modes or custom windows. : r/VIDEOENGINEERING
Amazon.com: HDMI Multiviewer Switch 4x1, Quad Seamless Switcher 4 in 1 Out with IR Remote Control, Support 4K Full HD and 5 Display Modes for Security Camera, Gaming Consoles : Electronics
Amazon.com: HDMI Multiviewer Switch 4x1 with PIP, PORTTA Quad Multi Viewer Seamless Switcher 4 in 1 Out with Toslink, 3.5mm Audio Output Support 1080p 60Hz, 6 Viewing Modes, Downscaler, Compatible with PS4
A-Neuvideo 16x1 HDMI Quad Screen Multiviewer and ANI-16-MV B&H
Ultra HD 4K Quad Multi Viewer 4x1 HDMI Switch VGA Output (HDS-401MV) | OREI