SFM-27 DC3-24V 10 PCS Electronic Alarm Buzzer Beep Active Piezo Buzzer 100dB Alarm Tone Continuous Sound, Black, 10pc

The active piezo electronic buzzer module supports a wide voltage DC 3-24V power supply. It emits a continuous tone. As long as it is powered, it will emit a continuous beep. Sound output: 100dB at 12V DC 30cm, Frequency response: 3000±500Hz. These buzzers are very loud and are not for indoor use; they could be used outdoors, such as in traffic areas, factories, etc. Rated current: 15mA, Module size: 30 x 15mm / 1.18 x 0.59 inches (D * T). Note: All data is measured manually; please allow a 1-3cm error. Due to differences in lighting and display, there may be some color variation; the actual product received shall prevail.