9 Alarm installations and alarms; Cameras; Electrolysers; Fire extinguishing apparatus; Measuring apparatus, namely, clamp meters for measuring electricity; Radiation gauges used for measuring the physical properties of materials; Radios; Semi-conductors; Time switches, automatic; Video recorders; Flashing safety lights; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Protection and safety apparatus, namely, inflatable flotation devices; Tool measuring instruments