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

Amazon

4 INPUT 1 OUTPUT FUNCTIONALITY: Switch between 4 HDMI sources on a single HDMI display, with 4K video resolution and fast switching for minimal disruption. EASY OPERATION: This 4 port HDMI switch has automatic, priority or manual switching so you can easily switch between your HDMI sources. ASTONISHING PICTURE QUALITY: Enjoy impressive image quality with support for UHD 4K @ 30Hz. For ultimate compatibility, the 4x1 video switcher is also backward compatible with HD 1080p. IR & RS-232 SERIAL CONTROL: This HDMI switch box features an IR remote control, letting you select your source remotely. As well, serial control ensures easy remote operation with serial devices. THE STARTECH.COM ADVANTAGE: StarTech.com offers a 2-year warranty and free lifetime technical support on this HDMI switch, and has been the choice of IT professionals and businesses for over 30 years.

ManoMano

The STARTECH 4-Port Automatic HDMI Video Switch seamlessly switches between four 4K video sources. It maintains Ultra HD 4K picture quality while switching between content from HDMI source devices. With its exceptional resolution and picture quality, it is ideal for bringing your digital displays to life.