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