Audible Alarm Type Horn, Visual Indicator Type No Visual Indicator, Voltage 24V AC, Decibels 78 to 103dB, Sound Pattern Continuous, Indoor/Outdoor Indoor, Mounting Surface, Height 5 in, Width 5 in, Depth 2.125 in, Vibrating Yes, Housing Material Heavy Duty Die Cast, Standards UL, Amps 0.63, Color Gray, Vibrating Horn