Audible Alarm Type Bell, Visual Indicator Type No Visual Indicator, Voltage 120V AC, Decibels 100dB @ 10 ft, Sound Pattern Continuous, Indoor/Outdoor Indoor, Mounting Flush or Semi-Flush Walls, Panels, Surface, Height 4 in, Width 4 in, Depth 2.5 in, Vibrating Yes, Housing Material Die Cast Zinc, Rating NEMA 4X/12, Operating Temp. -65 Degrees to 150 Degrees F, Standards UL E4813, CSA 00583X, FM, Amps 0.18 AC, Color Gray, Vibratone Horn