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
Buzzer with continuous sound 12VDC - Cablematic
Buzzer with continuous sound 12VDC - Cablematic
LEDLife: 50,000 hrsColor: RedInlet diameterø30mm(+0.5)Voltage12, 24, 110VAC/DC220VACSound modeIntermittent(deault), ContinuousVolume80 phone dB
Buzzer, 30mm Panel hole, 80dB, Continuous sound, IP40, 12V AC/DC
🔊Active piezo electronic buzzer module support DC 3-24V wide voltage power supply. It is a continuous Tone. As long as it is been powered it will Beep
2 PCS Piezo Buzzer, Icstation Buzzer Alarm 12V Electronic Beep Buzzer 100dB Piezo Alarm Siren Continous Sound for Motorcycle Golf Cart Vehicles Car
Alarms & Buzzers - Audio
HRB-KM Buzzer 12V 24V with 5 type sounds Adjustable 0-100 Decibels
HRB-KM Buzzer 12V 24V with 5 type sounds Adjustable 0-100 Decibels
KACON
Electromagnetic Buzzer - 5000 Series, 120V AC, 80dB - Solenoid Ninja
3-Pin 3038 AC Passive Piezo Electronic Buzzer Self-Excited Smoke
Buzzer with continuous sound 12VDC - Cablematic