There exists a one.35mm DC port for an exterior power supply but its linked on to the 5V line Therefore if you have to externally power, we advise prying open up the case and cutting the red 5V line with the USB https://jimlwjv989821.thechapblog.com/28139899/fascination-about-iogear-2x4-usb-3-1-gen-1-type-a-peripheral-sharing-switch