Simplex 4906-9154 Speaker Strobe with a Multi-Candela Synchronized Strobe
It has a 24 VDC xenon strobe with a selectable strobe intensity of 15, 30, 75, or 110 candela. The enclosure is impact and vandal resistant, and it can be installed on standard electrical boxes with extensions.
The Simplex 4906-9154 is white with red "FIRE" lettering. It is a combination speaker-strobe and notification appliance.