Safety Beacon helps building occupants and firefighters locate a means of egress in dark, smoky environments. Mount onto ground, wall, or door hinge or use as a doorstop. Comes with belt hook for convenience. Resists heat, chemicals, shock, and. A 350,000 lumens strobe light is housed in aluminum case and flashes up to 25 hrs. Features adjustable blink rate. Other beacons also available.