FDS

FIRE ALARM EQUIPMENT, ANTI-INTRUSION AND BURGLAR ALARM EQUIPMENT, AND SURVEILLANCE EQUIPMENT-NAMELY, MANUALLY ACTUATED SWITCHES AND ALARM BOXES, ELECTRICALLY ACTUATED BELLS, SENSORS FOR DETECTION OF SMOKE, HEAT, PRODUCTS OF COMBUSTION, PERSONNEL, SOUND OR VIBRATION, CENTRAL CONTROL SWITCHBOARDS, SIGNAL TRANSMITTERS AND RECEIVERS, RELAYS AND ANNUNCIATORS