Audible Alarm Type Horn, Visual Indicator Type No Visual Indicator, Voltage 12 to 24V DC, 16 to 33V DC, Decibels 90 dB, Sound Pattern Continuous, Indoor/Outdoor Indoor, Outdoor, Mounting Surface, Height 4.125 in, Width 4.125 in, Depth 2.7969 in, Vibrating No, Housing Material Plastic, Operating Temp. -65 Degrees to 150 Degrees F, Standards UL; ULC; CSFM; cUL, Amps 0.25, Color Gray, Includes Panel Mount Gasket, Horn