Amazon.com: 4K HDMI Multi Viewer Switch 4x1, Quad Seamless HDMI Switcher, 4 in 1 Out with Loop Split Screen, 5 Display Modes with IR Remote for Security Camera, Gaming : Electronics
4x1 4K60 UHD Quad/PiP/PoP Multiviewer Seamless Video Switcher | A-NeuVideo, Inc.
2x1 HDMI Multiviewer w/ PiP | A-NeuVideo, Inc.
The Revesun HDMI 2x1 Multi-Viewer with PIP is an affordable seamless switching solution - The Gadgeteer
HDMI 2x1 Multi-Viewer with PIP with rs232 and Remote control - HDMI splitters,extenders,matrix,switchers,converters manufacturer
HDMI Switcher 2x1 Multiviewer With PIP and POP - DestructiveBurn