Convenient "open-close-stop" push-button control. 24-volt system mounts at any handy location inside the building near the Hi-Fold Door. Normally does not require conduit (depending on local codes), which allows pre-wiring and flexible cable on the building frame. For safety, the operator must push the "stop" button before changing door direction. Can be stopped and started at any midpoint. Electric brake is standard. Comes factory-wired for 110-volts on 1 hp doors; 220-volts on 1.5 hp& 2 hp doors. Radio remote control is optional.