These vibrating bells are designed for use in fire, burglar, or general signaling systems. They offer low power consumption and high sound output. For indoor use, the unit can be mounted on a standard 4" (101mm) square electrical box. For outdoor applications, it can be mounted on either the BBK-1 weatherproof backbox or the BBX-1 deep weatherproof backbox. The BBK-1 weatherproof backbox is identified as Stock No. 1500001.

Features:

• Suitable for both indoor and outdoor use

• Outdoor use requires BBK-1 or HC-BB weatherproof backbox

• Indoor use mounts directly to a standard 4" electrical box

• Low power consumption

• High decibel output

• Available in AC and DC models

• DC models are motor-driven, polarized, and include built-in transient protection for supervised alarm circuits

• Sizes available: 6”, 8”, and 10”