Audible Alarm Type Horn Visual Indicator Type No Visual Indicator Voltage 120V AC Decibels 110 dB Sound Pattern Continuous Indoor/Outdoor Indoor Outdoor Mounting Conduit Surface Height 4 in Width 8 in Depth 3.5 in Vibrating No Housing Material Zinc Alloy 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