These vibrating type bells are designed for use as fire, burglar or general signaling devices. They have low power consumption and high decibel ratings. The unit mounts on a standard 4" (101mm) square electrical box for indoor use or on a model BBK-1 weatherproof backbox or BBX-1 deep weatherproof backbox for outdoor applications. Weatherproof backbox model BBK-1, Stock No. 1500001.
 
Features:
Listed for indoor and outdoor use
Outdoor use requires BBK-1 or HC-BB weatherproof back box
Indoor use mounts directly to standard 4” box
Low current draw
High dB output
AC and DC models
DC models are motor driven, polarized, and have built in transient protection for supervised alarm circuits
Available in 6”, 8” and 10” sizes