HDMI Multiviewer Switch 4x1,AUBEAMTO Quad Seamless Switcher 4 in 1 Out with IR Remote Control, Support 4K Full HD and 5 Display Modes for Security Camera, Gaming Consoles - Newegg.ca
4-Port HDMI Splitter, Ultra HD 4K @ 30 Hz (3840 x 2160) | Eaton
AV Access 4x1 4K HDMI Multiviewer, Seamless Quad-View HDMI Switch
HDMI Multiviewer 2x1 1080P 60Hz PIP POP 4 display modes-BUNGPUNG
Amazon.com: Optimal Shop 4X1 HDMI Multi-viewer HDMI Quad Screen Real Time Multiviewer with HDMI Seamless Switcher Function Full 1080P and 3D : Electronics
4K 9x1 HDMI Multiviewer 9 Screen Switcher Monitor Game TV Display 2 4 6 8 9 In 1 Out Multiviewer Seamless Switch Picture Divider - AliExpress
Amazon.com: 4x1 HDMI Multi-viewer & Seamless Switcher 4K 60Hz | 4 in 1 Out w/ 8 Display Modes, Audio Extract, Aspect Ratio Change, OSD, PiP, PBP, Quad Viewing by J-Tech Digital [JTECH-MV41A] :