Radio, televisi, tape recorder, amplifier, speaker, equaliser, compact disc player, VCD player, laser disc player, kabel audio, pesawat telephone, batu battery, pesawat video, antena televisi, booster, ballast, trafo, professional power amplifier, sound professional speaker system, mix speaker, mainan elektronik, tiang mic, kabel listrik/ speaker, antena parabola, komputer handphone, earphone tanpa kabel