Kacon HRB-PS50CR12V is a panel mount buzzer made for 30mm mounting holes. It has an 80dB continuous sound and is rated for 12V AC/DC.
2 PCS Piezo Buzzer, Icstation Buzzer Alarm 12V
Airotronics USA Tgkdb Cube Relay Timer Repeat Cycle off on 10a 24v
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2V 3V 5V 6V 9V 12V DC Piezo Electronic Buzzer Very
AC/230V - 35mm 230V AC Continuous Buzzer – Robocraze
DC 12V Active Electronic Buzzer Alarm Sounder Continuous 90dB Beep Speaker
DC 12V Active Electronic Buzzer Alarm Sounder Continuous 90dB Beep Speaker
3-Pin 3038 AC Passive Piezo Electronic Buzzer Self-Excited Smoke
AC/230V - 35mm 230V AC Continuous Buzzer – Robocraze
Alarms & Buzzers - Audio