Amplifier sound, salon bax berisi amplifier dan loudspeaker, tape recorder, radio tape mobil dan tranreciver, citizen, TV, VCD, DVD, pesawat penerima radio, tape recorder, video, mesin bicara, gramaphone, rewinder, amplifier, loudspeaker, microphone, megaphone, headphone, wireless, optik, kacamata, lensa-lensa, mikroskop, teropong, teleskop, pesawat komunikasi, walky talky, handy talky, pesawat telex, pita cassette, pita video disk recorder, laser disk, piringan hitam, compact disk, antena, booster, radar, parabola, accu, kotak accu, baterai, pengisi baterai, bel listrik, kabel telepon, travo, transformator, ballast, step up, step down, mesin faksimile, komputer, mesin hitung, kas register, kalkulator, mesin teleks, printer pesawat-pesawat ukur, speedometer, ampere meter, meteran listrik, volta meter, modem-modem, monitor (program komputer), CPU, stop kontak, sakelar, switch-switch, fiting-fiting, stetcker, sonar, setrika listrik, mesin fotocopy, disket, pesawat-pesawat pemadam api, alat solder listrik, segala macam jenis antena, segala macam tipe antena, antena outdoor/luar, antena indoor/dalam, antena parabola, radar, pesawat penerima radio, televisi, tape recorder, video, mesin bicara, gramaphone, rewinder, amplifier, loud speaker, microphone, megaphone, headphone, wireless, VCD, optik, kacamata, lensa-lensa, mikroskop, teropong, teleskop, pesawat komunikasi, airphone, walky talky, handy talky, pesawat teleks, pita-pita magnetik, pita cassette, pita video disk recordr, laser disk, piringan hitam, compact disk, booster, accu, baterai, bel listrik, kabel telpon, transformator, travo, ballast, step up, step down, mesin faksimile, komputer, mesin hitung, kalkulator, kas register, printer, pesawat-pesawat ukur, speedometer, ampere meter, meteran listrik, volta meter, modem-modem, monitor (program komputer), CPU, stop kontak, sakelar, switch-switch, fiting-fiting, stetcer, sonar, setrika listrik, mesin fotocopy, disket, pesawat-pesawat pemadam api, alat solder listrik