Turn on, turn off the appliance, low-frequency hum: Listen & Download Turn off the appliance,, Turn on .mp3 Error! Change your browser, please! ⇓ Download Wall switch ⚠ Switch ⚠ Small switch, toggle switch ⚠ Low frequency rumble ⚠ Movement, Low frequency electric drone ⚠ Shoots an electric arc indoors ⚠ Discharge, Current, electricity ⚠ Turn on, turn off the appliance, ⚠ Button click ⚠ Multichannel switch ⚠ Electric sparks ⚠ Electric transformer ⚠ ★★★★★