Acoustic couplers; Audio-receivers and video-receivers; Blank integrated circuit cards; Cabinets for loudspeakers; Copper wire, insulated; Electric switches; Electrical plugs and sockets; Electronic and optical communications instruments and components, namely, optical transceivers; Integrated circuits; Light emitting diodes (LEDs); Oscillographs; Portable media players; Sound transmitting apparatus; Switchboards; Transponders; Video game cartridges; Converters for electric plugs; Electric ju...