Alarm monitoring systems; Carbon dioxide detectors; Climate control digital thermostats; Downloadable computer software and firmware for operating system programs; Dust protective goggles and masks; Electric and electronic video surveillance installations; Electric wires and cables; Electrical and electronic burglar alarms; Fire and smoke detectors; Fire extinguishers; Fireproof garments; Gas testing instruments; Infrared detectors; Rechargeable electric batteries; Sensors for the determinati...