The BL-6B is a 6-inch motorized steel bell designed to provide loud, resonant acoustic signaling for fire alarm applications. Constructed with a durable steel shell and finished in red, it operates on a regulated 24 VDC supply with a low current draw of 20 mA to maximize the number of notification appliances on a circuit. It includes an integrated varistor suppression element to protect modern fire alarm control panels from RFI and EMF noise interference.