This North American style, multipurpose push button switch and clear Mini Stopper II cover protect a wide range of applications indoors. The button incorporates a unique, patented design and the clear cover helps prevent accidental activation. The highly advanced Stopper Station push button unit is ADA Compliant. The button incorporates a unique, patented design that helps dramatically to stop accidental activation. Molded unit has a pneumatic adjustable timer button.Mini Stopper II consists of a clear, tamperproof, super tough polycarbonate shield, frame and spacer that fits over manual pull stations. Cover contains no horn. Designed for surface mount units, spacer has knockouts for exposed conduit.