Audible Alarm Type Siren, Visual Indicator Type No Visual Indicator, Voltage 120/230V AC, 24V DC, Decibels 96 dB, Sound Pattern Continuous, Indoor/Outdoor Indoor, Outdoor, Mounting Surface, Height 8.2344 in, Width 5.2344 in, Depth 5.2344 in, Vibrating No, Housing Material Glass Reinforced Polyester, Rating IP 66, Operating Temp. -58 Degrees to 158 Degrees F, Standards ATEX and IECEx Certified, CE Listed, Pending UL, cUL, GOST, EAC, INMETRO Certifications, Zone 1, 21 Rated, EX D IIC