Fire Alarm Bell, Electric Bell, Call Bell Fire Alarm Bell, Electric Bell, Call BellDetailed Product Description Alarm Bell (1) Voltage: AC 12V, 24V,110V, 220V, 380V DC 12V, ... , 48V(2) Specification: 100 150 200 250 300mmAlarm sound≥86 ELectric BellDetailed Product Description Feature:- Working temperature: -25oC to +40 oC ...