Aerials; Ammeters; Amplifiers; Batteries and battery chargers; Battery chargers; Circuit boards provided with integrated circuits; Digital multimeters; Electric connectors; Electric relays; Electric switches; Electric wires and cables; Fibre-optic cables; Integrated circuits; Inverters; Optical fibers; Power adapters; Radios; Time switches; Transformers; Voltage monitor modules; Voltmeters; Wattmeters