Abstract: A headset including a housing, a speaker, an electrical signal sensor and a processor is provided. The electrical signal sensor is disposed in an internal cavity of the housing. The electrical signal sensor is configured to generate a first electrical signal according to a friction caused when an insertion portion of the housing is removed from an ear canal of an ear and generate a second electrical signal according to the friction caused when the insertion portion is inserted into the ear canal of the ear. The processor is configured to instruct an electronic device to stop playing an audio signal when receiving the first electrical signal and instruct the electronic device to play the audio signal when receiving the second electrical signal, so that the speaker outputs the audio signal.