This North American style,Multipurpose push button switch and clear Mini Stopper II cover are designed to compliment fire alarm systems 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 and UL Listed to U.S. and Canadian safety standards. Operation of the octagon button includes Push-to-Activate and Key-to-Reset. The unit incorporates quality features throughout, including raised lettering molded into its polycarbonate faceplate. The Mini Stopper II offers excellent protection against physical damage both accidental and intentional. The Mini Stopper II consists of a clear, super tough polycarbonate cover, frame and alarm that fits over the protected unit and conduit spacer. Note: Per UL Listing,This model available with inchFIRE inch label only.