Audible Alarm Type Horn, Visual Indicator Type Strobe, Voltage 24V AC/DC, Decibels 90 dB, Sound Pattern Continuous, Indoor/Outdoor Indoor, Mounting Surface, Height 5.5 in, Width 5.5 in, Depth 0.625 in, Vibrating No, Lens Color Red, Current Drawn 462 mA @ 24V AC, 412 mA @ 24V DC, Housing Color Gray, Housing Material Engineered , Light Output 21 CP, Flashes per Minute 60, Operating Temp. 32 Degrees to 120 Degrees F, Standards UL, Amps 412 mA @ 24V DC, 462 mA @ 24V AC