Pesawat penerima radio, televisi, tape recorder, video, mesin bicara, microphone, gramophone, megaphone, headphone, earphone, pick-up rewinder, amplifier, loudspeaker, wireless, telepon, airphone, walky talky, handytalky, pesawat komunikasi, pesawat telex, pita­pita magnetic, pita cassette, pita video, disc recorder, laser disk, piringan hitam, anthena, booster, radar, parabola, transformator, travo, ballast, step up, step down, komputer, stop kontak, sakelar, switch-switch, fiting-fiting, fiting kombinasi, steker