A microphone includes a main body surrounding a longitudinal axis that extends in a top-bottom direction, a battery holder mounted to the main body, and a protective cover. The protective cover has a cover body pivotally connected to and openably covering the battery holder for retaining a battery therein, and a positioning unit connected to the cover body. The protective cover is pivotable about a pivot axis transverse to the top-bottom direction to turn upward and downward and to move between a closed position, where the positioning unit engages the battery holder, and an opened position, where the positioning unit is disengaged from the battery holder in a direction transverse to the top-bottom direction.