Audible Alarm Type Bell, Visual Indicator Type No Visual Indicator, Voltage 120V AC, Decibels 100dB @ 10 ft, Sound Pattern Continuous, Indoor/Outdoor Indoor, Outdoor, Mounting Flush or Semi-Flush Walls, Panels, Surface, Height 4.5 in, Width 4.5313 in, Depth 3.625 in, Vibrating Yes, Housing Material Zinc w/Polyurethane Finish, Rating NEMA 4X, Operating Temp. -67 Degrees to 150 Degrees F, Standards UL, cUL, CSA, Amps 0.18 AC, Color Black, Signaling Device, Hazardous Class I, Hazardous Division 2