Audio devices, namely, amplifier integration interfaces, audio cables, audio equalizers, audio interfaces, audio signal amplifiers, audio signal distribution products, audio signal switchers, auxiliary input devices, band-pass filters, bass blockers; CD changer interfaces, digital sound processors for amplifying, distributing, equalizing, and mixing digital sounds, floating ground adapters, FM modulated audio receivers, FM modulated audio transmitters, 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; Security devices, namely, industrial automation and process control signal transmission cable doorlock interfaces, keyless entry systems comprised of remote controls to open and close doors, and timers; Noise control devices, namely, antenna ground loop isolators, choke filters, filtering capacitors, and power lead filters; Cell phone devices, namely, telecommunications interface devices, cell phone interfaces, charge cords, and doorlock interfaces; Portable-electronics interfaces, namely, portable digital electronic device accessories and interfacing, MP3 player accessories, MP3 player interfaces, 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, radio frequency audio/video transmitters, radio frequency video receivers, radio frequency video transmitters, video connection cables, video signal amplifiers, video signal switchers; Computer system control interfaces, namely, all-in-one triggers, industrial automation and process control signal transmission cable interfaces, infrared camera repeaters, infrared camera transmitters, low voltage triggers, pulse generators for factory radio and telecast kits, steering wheel interfaces for interfacing radio and temperature controls with the steering wheel, timers; Computer processing tools, namely, data and radio signal analyzers