12V Active Piezo Electronic Buzzer Alarm 3V–24V 85dB (2-Pack)

12V Active Piezo Electronic Buzzer Alarm – Continuous Tone, Wide Voltage Range

Keep your DIY electronics, car modifications, and alarm systems sounding loud and clear with this compact Active Piezo Electronic Buzzer. Rated at a powerful 85dB and compatible with a broad DC 3V–24V power range, this mini buzzer is the go-to choice for hobbyists, makers, and automotive enthusiasts alike.

Packaged as a 2-piece set, each buzzer features simple 2-wire pigtail connections for fast, hassle-free installation — no soldering expertise required. Whether you're building a security alert system, an Arduino project, or upgrading your vehicle's warning circuit, these buzzers deliver a reliable continuous alarm tone every time.

Made in Mainland China.

Key Specifications

• Working Voltage: DC 3V – 24V
• Rated Voltage: DC 12V
• Rated Current: 30mA
• Sound Output: 85dB
• Response Frequency: 3000 ± 500 Hz
• Module Size: 30mm × 15mm (Diameter × Thickness)
• Connection: 2-wire pigtail leads
• Package: 2 × Black Active Piezo Electronic Buzzers

Why Choose This Electronic Buzzer?

• ✅ Wide Voltage Compatibility – Works on DC 3V to 24V systems, making it incredibly versatile for 5V Arduino boards, 12V car circuits, and more.
• ✅ Loud & Clear 85dB Output – Ensures your alarm is heard even in noisy environments.
• ✅ Compact & Lightweight – Small 30×15mm footprint fits into tight spaces with ease.
• ✅ Easy to Wire – Pre-attached 2-wire pigtails mean quick plug-and-play connectivity.
• ✅ Continuous Tone – Provides a steady, uninterrupted alarm signal for dependable alerting.
• ✅ 2-Pack Value – Get two buzzers for added convenience or as a spare.

Common Applications

• Car and vehicle modification alarms
• Arduino, Raspberry Pi & DIY electronics projects
• Security and intrusion alert systems
• Industrial and home automation warning circuits
• Robot and RC vehicle audio alerts

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Safety & Standards Reference

For guidance on safe use of electronic components and electrical safety standards, visit the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: What voltage does this electronic buzzer alarm operate on?

A: This active piezo electronic buzzer supports a wide DC operating voltage range of 3V to 24V, with a rated voltage of 12V. This makes it compatible with a variety of power sources including Arduino (5V), standard 12V automotive systems, and other DC power supplies up to 24V.

Q: Is this an active or passive buzzer, and what is the difference?

A: This is an active buzzer, which means it contains its own internal oscillator and will produce a continuous tone simply by applying a DC voltage — no external signal or microcontroller code needed to generate the sound. A passive buzzer, by contrast, requires an AC or PWM signal to produce sound.

Q: How do I connect the electronic buzzer?

A: The buzzer comes with 2-wire pigtail leads — simply connect the positive (red) wire to your positive DC voltage source (3V–24V) and the negative (black) wire to ground. No special tools or soldering are required for basic connections.

Q: How loud is the buzzer alarm?

A: The buzzer produces a continuous alarm tone at 85dB at its rated voltage. This is comparable to a busy city street or a vacuum cleaner, making it clearly audible in most indoor and automotive environments.