Audible Alarm Type Siren, Visual Indicator Type No Visual Indicator, Voltage 12 to 24V AC/DC, 120 to 240V AC, Decibels 55 to 95dB, 65 to 105dB, Sound Pattern Continuous, Indoor/Outdoor Indoor, Outdoor, Mounting Base(sold separately), Conduit, Surface, Height 2.4375 in, Width 3.9063 in, Depth 3.9063 in, Diameter 3.9063 in, Vibrating No, Lens Color Gray, Current Drawn 35 to 240mA, Housing Color Gray, Housing Material Polycarbonate, Rating IP 65, NEMA 3R