Multiple Tone Signal, Indoor/Outdoor, Voltage 120VAC, Amps 0.36, Gray, Decibels 110db, Height 13 In., Width 8-1/4 In., Depth 8-7/8 In., Housing Material Zinc Alloy, Mounting 1/2 In. Conduit or Surface, Operating Temp. -31 Degrees to 104 Degrees F Hazardous Locations, -40 Degrees to 151 Degrees F Non-Hazardous Locations, Standards UL, cUL, Class 1, Div. 2, Groups A, B, C, D Class II Div.2, Groups F, G, Class III, Div. 1 and 2