Installation, repair and maintenance of fire safety, security, radio and telecommunication systems, industrial machines, and electrical and electronic apparatus, in the nature of electrical and electronic sensors, detectors, controllers, control panels, and display equipment used in fire safety systems, computer hardware used in fire safety systems, fire alarms and alarm signal transmitters and receivers for fire safety systems

Electrical warning installations and status sensors for sensing fire; combustion gas, gas, smoke, aerosol, flame and temperature detectors; wireless combustion gas, gas, smoke, aerosol, flame and temperature detectors; fire alarms; electronic signal transmitters and cables for electrical or optical signal transmission and display equipment; fire extinguishing equipment and sprinkler systems; alarm signaling systems, evacuation systems, and danger intervention systems, composed primarily of fi...