Semiconductors; Bar code printers; Barcode scanners; Biometric fingerprint door locks; Charging stations for electric vehicles; Digital door locks; Electric car charging piles; Electrical voltage tester pens; Electronic pens; Jewelers loupes; Locks, electric; Portable document scanners; Portable electronic recorder for measuring and recording multiple voltage, current and thermocouple readings from various transducers; Power switches; Voltage testers