| 摘要 |
An earphone jack is provided to allow a user to insert an earphone plug easily by using magnetism without directly seeing the earphone jack. An earphone(240) includes an earphone plug(241). The earphone plug(241) is formed as material having magnetism whose attractive force or repulsive force acts by a specific magnet. If an earphone plug formed as material having another magnetism whose attractive force acts to the magnetism of the earphone plug(241) is inserted, an earphone jack(220) emits the light of a set color to the outside.
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