Aerials; Commutators; Earphones; Semi-conductors; Transformers; Circuit breakers and circuit closers; Computer peripheral devices; Connections for electric lines; Converters for electric plugs; Couplings, electric; Electric adapter cables; Electric connectors; Electric plugs; Electric wires and cables; Electrical adapters; Electricity conduits; Electricity distribution consoles; Integrated circuits; Light emitting diodes (LEDs); Power supplies; Pressure sensors