All offers considered.
The CS1734B is 4-port KVM switch combined with a 2-port USB 2.0 hub. As a KVM switch, it allows users to access four computers from a single keyboard, monitor, and mouse console. There are four methods to obtain instant access to any computer in your installation: Pushbuttons, Hotkeys, OSD, and mouse.
Product site: https://www.aten.com/gb/en/products/kvm/desktop-kvm-switches/cs1734b/
I have done zero testing but powering it on as seen in the photo.