KVM switch compatible with 4K UHD HDMI video

Used to allow  two computers sharing one screen and you can flip between them by pressing the little button.

Works well with a switching time of about 2 secs on my set up good for switching between work and home computer. No longer required due to change of IT setup.

Blurb from Startech

2 Port HDMI KVM Switch - 4K 60Hz - Compact Dual Port UHD/Ultra HD USB Desktop KVM Switch w/Integrated 4ft Cables & Audio - Bus Powered & Remote Switching - MacBook ThinkPad