An earphone includes a loudspeaker, a rear housing and a front housing. The loudspeaker is disposed in the rear housing, a sound output hole is disposed at a first end of the front housing, a second end of the front housing is rotatably connected to the rear housing, and the front housing is rotatable relative to the rear housing and between a first position and a second position. In a case that the front housing is rotated to the first position relative to the rear housing, the sound output hole faces a first direction, and the loudspeaker is configured to output a first channel audio signal. In a case that the front housing is rotated to the second position relative to the rear housing, the sound output hole faces a second direction, and the loudspeaker is configured to output a second channel audio signal.