Audible Alarm Type Bell, Visual Indicator Type No Visual Indicator, Voltage 120V AC, Decibels 92 dB, Sound Pattern Continuous, Indoor/Outdoor Indoor, Mounting Surface, Height 7.125 in, Width 7.125 in, Depth 3.6875 in, Diameter 7.125 in, Vibrating Yes, Housing Material Steel, Features Weatherproof By Adding Appropriate Back Box, Standards FM, UL Listed, Amps 0.070A, Color Gray, Includes Hardware, Bell