Turn on, turn off the appliance, low-frequency hum: Listen & Download Turn on, turn off the appliance, .mp3 Error! Change your browser, please! ⇓ Download Multichannel switch ⚠ Button click ⚠ Turn on, turn off the appliance, ⚠ Electrical discharge surge ⚠ Switch ⚠ Wall switch ⚠ Electric transformer ⚠ Electric sparks ⚠ Electric discharges, Tesla coil ⚠ Shoots an electric arc indoors ⚠ Toggle switch, Small switch ⚠ Jacob’s ladder, Electric discharges ⚠ ★★★★★