WHAT IS THE DPN-4QUAD? DPN-4Quad is a dedicated multi-platform KVM switch capable of managing up to 4 different computers through four DisplayPort monitors, one USB keyboard & mouse, a single set of speakers and a USB 2.0 Device. HOW TO CONTROL DPN-4QUAD The USB emulation technology utilized by DPN-4Quad enables immediate hotkey source switching through a remote USB keyboard and mouse. DPN-4Quad uses single link connectors providing high resolutions of up to 4K (3840×2160 @ 30Hz) with zero pixel loss from TMDS signal correction.