Harga tertera untuk 1 pcsContinuous Alarm DC6-24V high decibel sound ringer buzzer SFM 27 speakerUkuran:Diameter 30mmTebal 15mmSpesifikasi:Rated voltage = 12V DCOperation voltage = 6-24V DCRated current = < 30mASound output = > 90 dBResonant freq = 3000 +/- 500 HzOperating temp = -20C s/d +60CStorage temp = -20C s/d +70C