Accumulators and batteries; Acoustic sound alarms; Air quality measurement apparatus, namely, particle counters; Alarm installations and alarms; Alarm monitoring systems; Alarm sensors; Alarms for the detection of inflammable gases; Apparatus and instruments for conveying, distributing, transforming, storing, regulating or controlling electric current; Atmospheric oxygen monitors; Batteries and battery chargers; Carbon dioxide detectors; Carbon monoxide detectors; Gas alarms; Gas detectors fo...