The Magelis STU HMI from Schneider Electric does more than give you a crystal clear display and control of all that is happening within your control panel — without even opening the door. It also offers a truly impressive, one-of-a-kind design that easily mounts, without tools, directly onto your control panel through a standard push-button opening. This effectively puts a 3.5” screen through a standard 22mm round hole answering the age-old questions of how to put a square peg, through a round hole.