FMC-420RW-GSGRD Manual call point glass surface mount, red is analog addressable manual call point with glass pane for indoor use, direct alarm triggering (type A), surface-mounted, red.
FMC-420RW-GSGRD is used to activate the fire alarm by hand when the person directly detects the fire and the automatic fire alarm system is not working yet or in areas where fire detectors are not installed.
Manual call point are usually installed in public places, easy to see places, easy to operate such as stairs, corridors, emergency exits, doors ...