The alarm bell is polarized for use with supervision circuitry and have under dome strikers & operating mechanismsThe diameter of the product shall be no smaller than nominal 6″(152mm).The bells can make large resonant sound.Low current, high decibel notification appliances for use in fire and burglary systems or other signaling applications.Provide loud resonant tones.Dial size: 6″Operating Voltage: 24V DC
