... , 220V, 380V,DC12V,24V, 48V (2) Size: 2inch -12inch KCB series fire alarm bell / Electric bellFeature: (1) Voltage: AC 12V, 24V ... ,110V, 220V, 380V DC 12V, 24V, 48V(2) Specification: Model No. Diameter(mm)Alarm sound weight KCB-4B100≥86350KCB-6B150900KCB ...