12V Sound and Light Alarm Siren Horn Buzzer (110 dB)
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Prices updated: 13 Oct 2026
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About this product
A 12V DC sound-and-light alarm siren with a flashing light and a loud horn, rated at 110 dB plus or minus 3 at one meter. It draws a rated current of about 300 mA and flashes 150 times per minute. Suited to alarm prototypes, security builds and warning indicators in DIY projects.
Specifications
- Rated voltage
- DC 12V
- Rated current
- 300 mA
- Flashing frequency
- 150 times/minute
- Sound pressure
- 110 ±3 dB/1m
- Size
- 122 × 72 × 43 mm
Frequently asked questions
Can a microcontroller pin drive this siren directly?
No. It needs 12V DC and draws about 300 mA, which is beyond a microcontroller pin. Switch it with a transistor, MOSFET or relay driven from the microcontroller.
How do I wire it?
Connect the positive lead to the 12V DC supply and the negative lead to ground, observing the polarity of the siren's leads.
