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DC3-20V Mini Electronic Buzzer for Circuits Piezo Electric Active Alarm 85dB Continuous Sound(3Pcs): Amazon.com: Industrial & Scientific
Amazon.com: Fielect 10 Pcs DC 1-30V 85dB Electronic Passive Buzzer Alarm Piezo Passive Buzzer Sounder 30 x 6mm : Electronics
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IIVVERR AC 24V 17mm Dia Electronic Alarm Buzzer Piezoelettrico Cicalino Piezo Sounder (AC 24V 17mm Dia Alarma electrónica Zumbador Piezoelettrico Cicalino Piezo Sounder - - Amazon.com
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Amazon.com: Stemedu 5PCS SFM-27 DC 3-24V Alarm Siren Electronic Piezo Active Buzzer, 95dB High Decibel Continuous Beep Speaker for Arduino : Electronics