Pesawat radio, pesawat televisi, radio tape recorder, video tape recorder, antenna, vidio compact disc, laser disc, power amplifier, loudspeaker, tape recorder, megaphone, headphone, booster, parabola, travo, ballast, step up/down, komputer, mesin hitung, printer, CPU, monitor (program computer), seterika listrik, sakelar, fiting-fiting, kabel listrik, konektor listrik, VCD player, DVD player, kabel audio