Alarm monitoring systems; Alarm sensors; Alarms for the detection of inflammable gases; Carbon dioxide detectors; Closed circuit TV systems for security and surveillance, namely, cameras, switchers, monitors, microphones, and recorders; Digital door locks; Fire alarm and emergency evacuation devices, namely, fire alarm control panels, smoke detectors, heat detectors, alarm pull stations, audible and visible notification appliances, strobes, sirens, bells, horns, and speakers; Fire and smoke d...