Aten CS1794 KVM HDMI/USB 4 ports + Audio 2.1

Amazon

4-port HDMI USB 2.0 KVMP Switch One USB console controls two HDMI-interface computers and two additional USB devices 2-port USB 2.0 hub built in; fully compliant with the USB 2.0 specification Independent switching of KVM, USB peripheral, and audio focus via front panel pushbuttons and hotkeys HDMI digital monitor support - fully compliant with HDMI 1.3a, also HDCP compliant

Currys

- Supports everything from 480i to full 1080p, keeping your video looking sharp across formats - If one computer powers down, it automatically switches to the next active one - no interruptions - Video DynaSync stores your monitor's EDID, so your display always loads at the right resolution