4 Ports 4K Multi Format Video Switch, combines the video Auto-switching with audio embedder, IR, and RS-232 serial/ GUI control function - VKSMC-421

VKSMC-421, Multi Format Video Switch, allows users to switch between 4 video sources (VGA, HDMIx2, DP) and then delivers the selected video stream to HDMI output. The “Auto-switching / input auto detecting” function always routes the last connecting stream (as first priority) to the output. Audio embedder function embeds audio from a 3.5-mm source to an HDMI signal. EDID Auto learning ensures that every video source is displayed at the optimal resolution and format without any compatibility issue.

KVM Switch with Serial Port Control, 4K@60Hz 4 in 1 Out HDMI KVM Switcher Box for Share Mouse Keyboard and Monitor, Can Work with Pi-kvm, Compatible with Windows/Linux/Mac System : Electronics

StarTech.com 4 Port HDMI Switch - 4K with Fast Switching, Auto-Sensing & Serial Control – Automatic 4x1 HDMI Video Switcher Box (VS421HD4KA), Black : Electronics

TESmart 4-Port HDMI KVM Switch with USB-C Input, 4K@60Hz

TESmart HDMI and USB C KVM Switch 4 Port Box, UHD 4K@60Hz RGB 4: 4:4, USB 2.0 Hub, Stereo Audio, Hotkey, Button Switching, PC Keyboard Mouse Switcher for 3 HDMI and 1

4K@60Hz HDMI Matrix Switch 4x4, HDMI Matrix Switcher Splitter 4 in 4 Out with RS232 Control, HDMI Matrix Selector Box with EDID, Support Auto Downscaler, HDR, HDMI2.0, HDCP2.2, 18Gbps : Electronics

KVM Switch with Serial Port Control, 4K@60Hz 4 in 1 Out HDMI KVM Switcher Box for Share Mouse Keyboard and Monitor, Can Work with Pi-kvm, Compatible with Windows/Linux/Mac System : Electronics

4K HDMI KVM Switch, 4 Port HDMI USB Switch for 4 Computer Share a 4K@30Hz Monitor and 3 USB Device Keyboard Mouse Printer, Including 4 KVM Cables : Electronics

KVM Switch HDMI 4K@60Hz for 4 Computers Share 1 Monitor, KVM Switch 4 Port with 4 USB 2.0 Ports Share Keyboard Mouse, Button Switch, Plug and Play, with 4 HDMI and 4 USB Cables… : Electronics

4K@60Hz HDMI Matrix Switch 4x4, HDMI Matrix Switcher Splitter 4 in 4 Out with RS232 Control, HDMI Matrix Selector Box with EDID, Support Auto Downscaler, HDR, HDMI2.0, HDCP2.2, 18Gbps : Electronics