This SFM-27 active buzzer has quite a few decibels (more than 95dB!). This buzzer is mainly used in alarm systems since these buzzers make a deafening noise attracting all attention. This buzzer is suitable for 12V, but can handle a voltage between 3V and 24V. Since this buzzer generates its own frequency (3000 Hz), iyou will only need to connect power to activate the alarm. https://elecena.pl/product/27738899/opencircuit-sfm-27-12v-alarm-buzzer 2025-01-22 https://elecena.pl/product/27738899/opencircuit-sfm-27-12v-alarm-buzzer 2025-03-22 https://elecena.pl/product/27738899/opencircuit-sfm-27-12v-alarm-buzzer 2025-04-20 https://elecena.pl/product/27738899/opencircuit-sfm-27-12v-alarm-buzzer 2025-05-29 https://elecena.pl/product/27738899/opencircuit-sfm-27-12v-alarm-buzzer 2026-02-15 https://elecena.pl/product/27738899/opencircuit-sfm-27-12v-alarm-buzzer 2026-02-18 https://elecena.pl/product/27738899/opencircuit-sfm-27-12v-alarm-buzzer 2026-04-11 https://elecena.pl/product/27738899/opencircuit-sfm-27-12v-alarm-buzzer 2026-04-25