Calibration devices for calibrating optical emission spectrometers; Chargers for smartphones; Computer network interface devices; 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; Electric connections and connectors; Electrical interconnect cables; Electronic and optical communications instruments and components, namely, communication link testers for testing communication links; Electronic and optical communications instruments and components, namely, optical transmitters; Electronic cables; Electronic interconnecters for audio and video signals; Electronic switchers for audio and video signals; Home networking modules comprising electronic components being electric cabling panels and associated wiring; Matrix switchers for audio and video signals; Transmitters and receivers for audio and video signals for transmission over twisted pair cables; Wireless charging stands for smartphones