The Beacon Base is a loop-powered visual indicator combined with a standard Intelligent Mounting Base. It is used to signal a fire alarm in enclosed areas. The visual indicator base can be used with either a detector fitted or with a cap as a stand-alone alarm device. Visual indicator flash rate of once per second Synchronisation of visual indicator flash Individual and group addressing Unique visual indicator self-test Loop-powered Built-in Isolator (SEN-A4009)