Acoustic sound alarms; Gas alarms; Alarm sensors; Alarms for the detection of inflammable gases; Batteries; Smoke alarms; Computer hardware and computer peripheral devices; Safety sensors, namely, carbon monoxide detectors, smoke detectors, and combination carbon monoxide and smoke detectors; Data cables; Digital projectors; Digital signage; Electronically-operated door latches; Electronic warning bells; Mounting devices for cameras and monitors; Security and fire alarms; Smartphones; Smoke d...