Aircraft test boxes for testing power supply, electrical system; Carrying cases, holders, protective cases and stands featuring power supply connectors, adaptors, speakers and battery charging devices, specially adapted for use with handheld digital electronic devices, namely, cell phones, MP3 players, personal digital assistants; Consumer electronic products, namely, audio amplifiers, audio speakers, audio receivers, electrical audio and speaker cables and connectors, audio decoders, video decoders, speakers, power conversion devices, power converters, and power inverters; Day and night vision systems primarily comprised of day and night sensors, day and night cameras, and monitors; DC/AC power converters; Electrical voice intracommunications systems comprising control stations, interface modules, frames, controller cards, connectors, power supplies, panels and mountings for use in the production of live musical performances, theatre, and other live events; Electronic power supplies for driving electric motors; High-frequency switching power supplies; Inverters for power supply; Power adapters; Power adapters for computers; Power supplies; Power supply connectors and adaptors for use with portable electronic devices