Ammeters; Semiconductors; Wattmeters; Cards with integrated circuits; Electric sensors; Electrical sockets; Electronic components in the nature of capacitors, connectors, filters, oscillators, relays, switches, transformers, resistors, semiconductors, integrated circuits, rectifiers, transistors; Integrated circuits; Light emitting diodes (LEDs); Oscillographs; Power controllers; Printed circuit boards; Semiconductor chips; Thermo-hygrometers; Voltage stabilizing power supply