商品櫥窗＞蜂鳴器＞Self Drive Piezo Buzzer (Pin Type)● 型號：BUZZER蜂鳴器● 規格：OD14*7.5mm,5VDC,Freq.:4KHz● 描述：PIEZO BUZZER,Self Drive Piezo Buzzer 蜂鳴器