Review on HDMI 4 Port KVM Switch: Share Keyboards, Mice, and Devices Across 4 Computers with 4K@60Hz Support by Chad Delgado

Power this dock with an old Windows 7 PC with HDMI, a Windows 10 desktop with a DP to HDMI adapter, and a Surface Book laptop through its own USBc -Dock and then HDMI. Connected to a wireless keyboard, mouse and 43" TCL TV. I get 4k from all devices. The fourth serves as an available port for machines requiring service. Considering how diverse my usage is, the dock worked VERY well. I did NOT need to connect to a power source. The buttons on the KVM switch work well. "Button Extension" works well too. Installation was quick and clean. I didn't need a reboot. due to the driver detected and installed - but that's all because the machine is so outdated and is not a mirror image of the switch. I can't think of any complaints yet.