Audio devices, namely, amplifier integration interfaces, audio cables, audio interfaces, audio signal amplifiers, audio signal distribution products, audio signal switchers, auxiliary input devices, band-pass filters, bass blockers; CD changer interfaces, high-pass filters, line drivers, line output converters, low-pass filters, power resistors; Radio frequency audio receivers, radio frequency audio transmitters, radio installation interfaces, RCA level attenuators, RCA level controller, RCA switcher satellite radio interfaces, and volume controls; Noise control devices, namely, antenna ground loop isolators, choke filters, filtering capacitors, and power lead filters; Cell phone devices, namely, telecommunications interface devices and cell phone interfaces; Portable-electronics interfaces, namely, portable digital electronic device accessories and interfacing, MP3 player accessories, MP3 player interfacing, PDA interfaces, and portable video player interfacing; Audio/video devices, namely, video processors, DVD changer interfacing, DVD interfacing, game system interfaces, in-car entertainment system interfacing, LCD video monitor interfacing, navigation computer interfaces, navigation computer system interfacing, radio frequency audio/video receivers, video connection cables, video signal switchers; Telecommunications system control interfaces, namely, all-in-one triggers, industrial automation and process control signal transmission cable interfaces, infrared camera repeaters, low voltage triggers, pulse generators for control of after-market radios and portable MP3 devices, timers; Computer processing tools, namely, data and radio signal analyzers