Audible Alarm Type Siren Visual Indicator Type No Visual Indicator Voltage 24V DC Decibels 101 to 108dB Sound Pattern Continuous Indoor/Outdoor Indoor Outdoor Mounting Surface Height 17 in Width 13.1094 in Depth 16.3125 in Vibrating No Housing Material Die Cast Aluminum Rating NEMA 4X Operating Temp -67 Degrees to 151 Degrees F Standards UL cUL Class 1 Div. 1 Groups B C D Amps 0.12 to 0.60 Color Gray Speaker Hazardous Class I Hazardous Division 1