四路抢答器，可供四名选手参加比赛的智力竞赛抢答。选手按下按键后，其他选手按下无效，同时对应的指示灯亮，蜂鸣器发出音响。由主持人控制指示灯和蜂鸣器复位。-Quad Responder, for four players to participate in quiz competition Responder. Press the key players, other players press the invalid, while the