Horn Siren Home Security Sound Alarm System 120dB DC buzzer 12V BX3 ,R27

DescriptionIn physical security and smart home design, the difference between a notification and a true deterrent is volume. A standard 5V buzzer is great for letting you know a microwave is done, but to actively scare off an intruder or alert an entire warehouse to an emergency, you need serious acoustic power. The 12V Wired Siren Alarm delivers an ear-piercing 120dB sweep that instantly commands attention.The 3.5mm Plug InterfaceAt the end of the red and black power cable, you will find a standard 3.5mm plug. While this looks exactly like a common headphone jack, do not plug this into an audio device. In the security industry, the 3.5mm jack is frequently used as a quick-disconnect power plug for 12V alarm peripherals.Plug and Play: If you are using a commercial GSM alarm system or a smart home security hub, this siren will likely plug directly into the “Siren/Alarm Out” port on the back of the unit.Custom DIY: If you are building a custom system, simply snip the 3.5mm connector off to expose the red (Positive 12V) and black (Ground) wires for direct soldering or terminal block insertion.Driving the Siren (Crucial Circuit Design Note)Because this siren operates at 12V DC and draws significantly more current than a standard sensor, it cannot be powered directly by an Arduino, Raspberry Pi, or ESP32. To integrate this into a custom microcontroller project, you must use a separate 12V power supply to run the siren, and use a Relay Module or a high-power MOSFET transistor to act as a digital switch, allowing your 5V/3.3V logic board to safely trigger the massive 12V alarm.Rugged and Ready to MountThe siren is enclosed in a durable, high-impact ABS plastic shell designed to withstand physical shock and protect the internal piezoelectric acoustic driver. The base features a sturdy mounting bracket with pre-drilled holes, allowing you to quickly secure the alarm high up on a wall, under the eaves of a roof, or inside a security control box.Key Features:Deafening Volume: At 120 decibels, the sound is painful at close range and can be heard clearly through walls and across large properties.Universal Compatibility: The 3.5mm connector matches the standard output of most commercial alarm panels globally.Easy Installation: Flat mounting base and screw holes ensure a firm, permanent installation in minutes.Technical Specifications:Rated Voltage: 12V DCOperating Voltage Range: 9V to 14V DCRated Current: ~350mASound Output Level: 120dB (at 1 meter)Acoustic Frequency: Continuous fluctuating siren sweepConnector Type: 3.5mm Plug (Mono/TS configuration for power)Housing Material: ABS PlasticIdeal Applications:Primary acoustic deterrent for DIY smart home security systemsPanic button alarms for workshops, garages, and retail countersIndustrial warning signals for automated machineryReplacement sirens for commercial GSM/WiFi security panels