---
product_id: 289427904
title: "3PCS DC 3-24V 90dB Active Piezo Electronic Buzzer Beep Tone Alarm Ringer Continous Sound (Black) SFM-27-W"
brand: "weichuang"
price: "€ 12.97"
currency: EUR
in_stock: true
reviews_count: 8
category: "Weichuang"
url: https://www.desertcart.com.cy/products/289427904-3pcs-dc-3-24v-90db-active-piezo-electronic-buzzer-beep
store_origin: CY
region: Cyprus
---

# Wide 3-24V DC range 90dB loud output Compact 30x15mm size 3PCS DC 3-24V 90dB Active Piezo Electronic Buzzer Beep Tone Alarm Ringer Continous Sound (Black) SFM-27-W

**Brand:** weichuang
**Price:** € 12.97
**Availability:** ✅ In Stock

## Summary

> 🔔 Don’t just secure it—announce it with WEICHUANG’s piercing power!

## Quick Answers

- **What is this?** 3PCS DC 3-24V 90dB Active Piezo Electronic Buzzer Beep Tone Alarm Ringer Continous Sound (Black) SFM-27-W by weichuang
- **How much does it cost?** € 12.97 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/289427904-3pcs-dc-3-24v-90db-active-piezo-electronic-buzzer-beep)

## Best For

- weichuang enthusiasts

## Why This Product

- Trusted weichuang brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Reliable & Ready:** Backed by a 1-year warranty and trusted by thousands for consistent, long-lasting alarms.
- • **Compact & Discreet:** Slim 30x15mm footprint fits effortlessly into tight spaces without compromising performance.
- • **Powerful 90dB Alert:** Cut through noise with a piercing 90-decibel beep that commands attention instantly.
- • **Plug & Play Simplicity:** Active piezo design means no extra drivers needed—just power it on and hear the alert.
- • **Universal Voltage Compatibility:** Seamlessly operates across a broad 3-24V DC range, perfect for diverse vehicle and DIY projects.

## Overview

The WEICHUANG SFM-27-W is a 3-pack of active piezoelectric buzzers delivering a robust 90dB continuous beep at 12V DC. Designed for universal compatibility, it supports a wide voltage range from 3 to 24V, making it ideal for vehicle alarms and DIY security projects. Compact and easy to install, these buzzers require no additional drivers and come with a 1-year warranty, ensuring reliable performance and peace of mind.

## Description

Product parameter Length of Wire: 12cm /4.72in Diameter: 3cm /1.2in Rated Voltage: 12V Range of Voltage: 3-24VDC Rated Current: 15mA at 12VDC Sound Pressure Frequency: 100dB at 12VDC /30ma Resonant Frequency: 3.0±0.2KHZ Operating Temperature: -20+45 Degree C Storage Temperature: -20+60 Degree C Package Includes: 3× SFM-27-W DC 3-24V Active piezoelectric buzzerr

Review: A good cheap car mod for anyone without an alarm - Bought these to wire in as a “lock” alarm that didn’t exist on my Toyota. Works great to add a remote lock beep to the car and good for many other uses I’m sure. I wired 2 in a series and hid the wires with the factory wire loom on the firewall of my truck. They’re pretty loud and no issues with reliability. A good cheap car mod. I saved the 3rd alarm as a backup in case one of the other 2 ever fails.
Review: Great little buzzers! - These are seriously loud - at 9V they put out impressive volume, definitely living up to the 90dB rating. Perfect for alarm projects or anywhere you need an attention-grabbing sound. The 3-pack is a nice bonus too. Would definitely recommend for any electronics projects that need a powerful alert sound.

## Features

- Active piezoelectric buzzerr,piezo alarm, module support DC 3V 12V 24V wide voltage power supply
- SOUND OUTPUT: The buzzer alarm is 100dB at 12V DC 30cm, you can wait until the volume you think of by adjusting the voltage. Response frequency: 3±500Hz
- RATED CURRENT:15mA at 12VDC,12V Alarm Module Size: 30 X 15mm/1.18 X 0.59inch(D*T)
- SOUND TYPE: continuous sound,No need to drive, it will make a sound when power is on
- 100% QUALITY ASSURANCE,The warranty is 1 year. During the warranty period, if there is any quality problem with the 24v alarm, please contact us.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08SL2HH65 |
| Best Sellers Rank | #8,920 in Electronics ( See Top 100 in Electronics ) #23 in Security Horns & Sirens |
| Control Method | Touch |
| Customer Reviews | 4.5 4.5 out of 5 stars (291) |
| Date First Available | January 10, 2021 |
| Item Weight | 0.845 ounces |
| Item model number | SFM-27-W |
| Manufacturer | WEICHUANGJING |
| Mounting Type | Wall Mount |
| Noise Level | 90 Decibels |
| Product Dimensions | 1.18 x 1.18 x 0.59 inches |
| Sensor Technology | Piezoelectric Sensor |
| UPC | 788470969590 |
| Voltage | 24 Volts |

## Product Details

- **Brand:** WEICHUANG
- **Color:** black
- **Compatible Devices:** DC Powered Devices
- **Power Source:** DC Powered
- **Product Dimensions:** 1.18"L x 1.18"W x 0.59"H

## Images

![3PCS DC 3-24V 90dB Active Piezo Electronic Buzzer Beep Tone Alarm Ringer Continous Sound (Black) SFM-27-W - Image 1](https://m.media-amazon.com/images/I/61K2+rI5z+L.jpg)

## Questions & Answers

**Q: Does this buzzer need to be driven?**
A: No need to drive, you just need to connect the power and it will make a sound

**Q: Is the sound of this unit a Beep, Buzzer or Siren?**
A: It's a beep. I used my mobile phone to take a picture of the sound made by connecting a 9V battery. You can turn it on to see if it meets your requirements.

**Q: What is the wire gauge size?**
A: pretty small,  maybe 18 or 20 awg.   I connected to 18awg on a 28vdc 3amp system.  and it works great.

## Customer Reviews

### ⭐⭐⭐⭐⭐ A good cheap car mod for anyone without an alarm
*by J***S on October 12, 2025*

Bought these to wire in as a “lock” alarm that didn’t exist on my Toyota. Works great to add a remote lock beep to the car and good for many other uses I’m sure. I wired 2 in a series and hid the wires with the factory wire loom on the firewall of my truck. They’re pretty loud and no issues with reliability. A good cheap car mod. I saved the 3rd alarm as a backup in case one of the other 2 ever fails.

### ⭐⭐⭐⭐⭐ Great little buzzers!
*by B***N on October 22, 2025*

These are seriously loud - at 9V they put out impressive volume, definitely living up to the 90dB rating. Perfect for alarm projects or anywhere you need an attention-grabbing sound. The 3-pack is a nice bonus too. Would definitely recommend for any electronics projects that need a powerful alert sound.

### ⭐⭐⭐⭐⭐ loud beeper
*by G***Y on September 15, 2025*

Loud using 12V battery! Not excessively loud, but it can be heard from about 50 feet away. Would be nice if the wires were larger gauge to make connections easier. The wires are about 20-22 gauge solid wire which requires soldering the wires to connect them to anything. I needed to connect with spade connectors so I had to solder the wires to the connectors before I could connect to the power feed wires. I have only had them installed for about a week so I am not sure how long they will last, but for the price and getting three it was a good deal.

## Frequently Bought Together

- WEICHUANG 3PCS DC 3-24V 90dB Active Piezo Electronic Buzzer Beep Tone Alarm Ringer Continous Sound (Black) SFM-27-W
- VWEICYY 9V Battery Connector,10 PCS T-Type 9 Volt Buckle Connector Hard Plastic Shell Used in Student Experiment,or Other Equipment with Battery(T-Type, 10PCS)
- WGGE WG-026 10 Pieces and 5 Colors Test Lead Set & Alligator Clips,20.5 inches / 22 AWG Copper Wire. The Clips soldered and Stamping to The Wires. (1 Pack)

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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-01-31*