The invention provides a speaker which comprises a bottom part and a magnetic conductive outer cover connected with a side wall of the bottom part, wherein the bottom part and the side wall define an accommodating space and an opening; and the speaker further comprises a magnet which is arranged in the accommodating space, a vibration membrane arranged at the opening and a switching element whichis arranged at the bottom part, wherein the switching element comprises an extension part, the extension part penetrates the magnet and is separated from the vibration membrane with a distance, and vibration membrane is pressed to lead the vibration membrane to be in contact with the extension part and operate the switching element.