{"product_id":"2-pack-high-decibel-active-piezoelectric-alarm-buzzer-dc-3-24v","title":"2-Pack Active Piezoelectric Alarm Buzzer DC 3-24V | 90dB","description":"\n\u003ch2\u003e2-Pack High Decibel Active Piezoelectric Alarm Buzzer – DC 3-24V\u003c\/h2\u003e\n\u003cp\u003eKeep your home, office, or project secure with this powerful \u003cstrong\u003eactive piezoelectric alarm buzzer\u003c\/strong\u003e. Delivering a loud 90dB continuous warning tone, this compact electronic buzzer is built for a wide variety of safety and alert applications. The broad DC 3–24V operating range makes it compatible with virtually any electronic system — from DIY projects to commercial security installations. You get \u003cstrong\u003etwo buzzers\u003c\/strong\u003e in every pack for maximum versatility and value.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh 90dB Output:\u003c\/strong\u003e Produces a loud, attention-grabbing continuous sound to effectively signal alerts in any environment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e Operates on DC 3–24V, making it suitable for a broad range of devices, control boards, and security systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eActive Piezoelectric Design:\u003c\/strong\u003e Built-in oscillator means no external signal generator is needed — simply apply power and the buzzer sounds immediately.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Build:\u003c\/strong\u003e Black plastic housing rated for operating temperatures from -20°C to +80°C, ensuring reliable performance indoors and outdoors.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEasy Installation:\u003c\/strong\u003e Mount in place with hardware or use adhesive — flexible installation options for any project or enclosure.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Applications:\u003c\/strong\u003e Ideal for security systems, game buzzers, DIY electronics, automotive warning signals, industrial alerts, and more.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Black\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 11.00 x 3.50 x 1.00 cm \/ 4.32 x 1.38 x 0.39 in\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Range:\u003c\/strong\u003e DC 3–24V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Voltage:\u003c\/strong\u003e 12V DC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Sound Pressure:\u003c\/strong\u003e 90dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Frequency:\u003c\/strong\u003e 3300 ± 500 Hz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e -20°C to +80°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 2 pieces per pack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in Mainland China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 × Active Piezoelectric Alarm Buzzer\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-cord-end-caps-with-loop-jewelry-making-6pcs\"\u003eStainless Steel Cord End Caps with Loop – 6pcs Jewelry Findings\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/metal-q-ring-spring-clasps-gold-silver-plated-jewelry-connectors\"\u003e10pcs Metal Q Ring Spring Clasps Gold Silver Plated Jewelry\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Does this active piezoelectric alarm buzzer require an external signal to operate?\u003c\/h4\u003e\n\u003cp\u003eA: No. Because it features an \u003cstrong\u003eactive piezoelectric design\u003c\/strong\u003e, the oscillator circuit is built in. Simply connect it to a DC 3–24V power source and it will immediately emit a continuous warning sound — no external signal generator or microcontroller tone output is needed.\u003c\/p\u003e\n\u003ch4\u003eQ: What voltage should I use for the best performance from this alarm buzzer?\u003c\/h4\u003e\n\u003cp\u003eA: The buzzer operates across a wide range of DC 3–24V. The rated voltage is \u003cstrong\u003e12V DC\u003c\/strong\u003e, which delivers the full 90dB output. It will still function at lower voltages (down to 3V), though sound output may vary slightly.\u003c\/p\u003e\n\u003ch4\u003eQ: Can this buzzer be used outdoors or in automotive applications?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. With an operating temperature range of \u003cstrong\u003e-20°C to +80°C\u003c\/strong\u003e and a durable plastic housing, it is well-suited for both indoor and outdoor use, as well as automotive and industrial warning applications.\u003c\/p\u003e\n\u003ch4\u003eQ: How do I install the alarm buzzer?\u003c\/h4\u003e\n\u003cp\u003eA: Installation is straightforward. You can mount the buzzer using hardware through its housing, or use strong adhesive tape to attach it to a flat surface. Connect the positive and negative leads to your DC power supply and it is ready to use.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does this active piezoelectric alarm buzzer require an external signal to operate?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. Because it features an active piezoelectric design, the oscillator circuit is built in. 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