TV One C2-8000 Universal Input Seamless Switcher C2-8210 B&H
Seamless Switcher – Vitbest
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
Magnimage MIG-EC90 4K Seamless Switcher Led Video Processor Console – LED Controller Store
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 :
AVSC-HDMI2-8X2, 8x2 Video Matrix Switcher, 18G Seamless Switching, HDMI 2.0 - Black Box