Cover fixed to the base plate with two vandal-proof lock screws and lock with special key wrench. Adjustable motor: high pressure universal brush, fully adjustable (18,000-26,000 RPM) potentiometer, class A. 60 second vandal thermal cut-off. 250 watt waved wire Ni-Cr heating element that incorporates a self-resettable thermal cut-off at 180° F after 60 seconds of continuous use. Adjustable sensor: electronic infrared detection sensor with fully adjustable (2" - 8") potentiometer. Includes polycarbonate viewing windows. Automatic shut-off after 60 seconds. Fire resistant UL V0 plastic base, with four holes for wall mounting. Includes silent blocking to dampen mechanical vibrations.