The Cranford Controls' VBL 6" motorized bell has been designed to deliver maximum sound performance along with quick and easy installation and a sleek low profile. Its low current consumption, ease of installation incorporating diode polarity suppression and traditionally recognisable bell sound, makes it an ideal choice for use in a wide range of signalling applications including fire alarm and class change. The Fire Alarm Bell also includes two series diodes to facilitate fault monitoring by the fire control panel.