There is a port for an external power supply but its linked straight to the 5V line Therefore if you must externally power, we advise prying open up the situation and slicing the purple 5V line from your USB https://lillisusj000704.vidublog.com/29675440/a-review-of-visiontek-vt2900-usb-c-dual-system-kvm-docking-station-with-100w-power-delivery