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 corresponding indicator light, buzzer sound. Control indicator and the buzzer by the host reset.