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.

Video Switcher, 4k 30Hz 4x4 HD Multimedia Interface Switch RS232 Custom Protocol Plug and Play with Remote Control for Conference Room (US Plug) : Electronics

4x4 HDMI Matrix Switch Switcher 4K 1080P, Ethernet APP Optional, Video HDCP RS232 IR Remote Control Scenes Conrol - AliExpress

4 Inputs 2 Outputs HD Multimedia Interface Switch, 4K 60Hz Resolution EDID Bypass, 3X6gbps Data Rate, 3.5MM Sound Output, 100V 240V Suitable for LPCM DTS(USA) : Electronics

KVM Switch HDMI 4 Port Support 4K@60Hz 2K@120Hz Simulation EDID,Hotkey KVM Switch for 4 Computers Share 1 Monitor and 4 USB Port,with Remote Control and KVM Cables : Electronics

USB KVM Switch HDMI 4K@60Hz 4 Port,4 in 1 Out with 4 USB 3.0 / USB 3.1 Hub,SPDIF and Stereo,Compatible with Most Keyboards and Mouse,Button or IR Remote Control for Windows,Linux,Unix

IOGEAR - GHSW8141 - 4-Port HDMI Audio/Video Switch with RS-232 Support

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

4 In 4 Out 4K 30Hz RS232 HD Multimedia Interface Switch

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 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

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 4 Ports HDMI Switch combines the video Auto-switching with EDID, IR, and RS-232 serial control function - VKGM-S41

4-Port HDMI 2.0 4K HDR Smart Console KVM Switch with USB 3.0 and Multimedia Ports