商品櫥窗＞蜂鳴器＞Self Drive Piezo Buzzer (Pin Type)● 型號：PIEZO BUZZER蜂鳴器● 規格：OD23*17mm,12VDC,Freq.:3.7KHz● 描述：PIEZO BUZZER,Self Drive Piezo Buzzer蜂鳴器