90dB Magnetic Window & Door Security Sensor Alarm (12-Pack)

Secure your entire home, office, or rental property with cost-effective intrusion deterrence using the 90dB Sound Emergency Magnetic Window & Door Sensor Alarm (12-Pack Value Bundle). Designed for rapid, non-invasive installation, this bulk security pack utilizes responsive magnetic reed-switch technology to detect unauthorized opening of perimeter windows, entry doors, sliding ranch sliders, and display cabinets.

The instant a protected opening is breached and the magnetic seal separates by more than 10–15 mm, the internal sounder fires a sharp 90-decibel acoustic siren, instantly alerting occupants, waking sleeping family members, and startling prospective intruders away before entry is completed.

Operating 100% wire-free on included button batteries with pre-applied heavy-duty peel-and-stick adhesive, it provides comprehensive property-wide protection without tools, drilling, or running electrical cables.

Key Features & Specifications

• Product Type: Magnetic Reed-Switch Window and Door Intrusion Alarm.

• Bulk Value Pack: Contains 12 complete sensor sets (12x Main Alarm Units + 12x Magnetic Contact Strips) to outfit an entire house, apartment, or commercial floor.

• Piercing 90dB High-Output Acoustic Siren:

  • High-efficiency piezo buzzer emits an immediate, piercing ≥ 90dB siren the moment the magnetic field breaks.

  • Designed to cut through ambient household noise, alert neighbors, and disorient intruders trying to open ground-floor windows.

• Simple & Reliable Magnetic Contact Sensor:

  • Works on standard magnetic induction principles (alarm triggers when the distance between the host unit and the magnetic bar exceeds 10–15 mm).

  • 100% mechanical reliability—zero wireless latency, zero app crashes, and zero network configuration issues.

• Manual ON / OFF Toggle Switch:

  • Convenient side toggle allows you to disarm individual sensors during daytime ventilation or when leaving windows open for fresh air.

• 100% Cordless & Battery-Operated:

  • Powered by economical, long-lasting button cells (e.g., 3x 1.5V LR44 / AG13 button batteries per unit, included/pre-installed).

  • Ultra-low quiescent drain provides up to 12 months of standby power.

  • Quick-slide battery cover enables tool-free battery replacement in seconds.

• Peel-and-Stick Non-Invasive Mounting:

  • Comes with pre-fitted industrial-grade double-sided adhesive backing on both the host unit and magnetic strip.

  • Mounts securely onto aluminum, timber, UPVC, glass, and steel frames without screws, holes, or damaging paint.

Broad Universal Applications & Target Environments

• Perimeter Windows & Doors: Secure ground-floor sash windows, side entry doors, basement casements, and sliding balcony doors.

• Child & Toddler Safety: Mount high on exterior sliding ranch sliders, swimming pool gate doors, or medicine cabinets to alert parents if a toddler slips outside unnoticed.

• Rental Homes, Flats & Baches: 100% renter-friendly; zero drilling or hardwiring preserves full rental bond with easy peel-off removal when vacating.

• Retail Stores & Display Cases: Protect high-value glass retail display cabinets, stockroom access doors, and behind-counter drawers against petty theft.

• Workshops, Garages & Sheds: Outfit perimeter outbuilding doors and shed windows without needing mains power or extending household WiFi signals.

Quick 4-Step Setup & Installation Guide

1. Prepare Surfaces: Clean the mounting surface on the door/window frame with rubbing alcohol to remove grease and dust, ensuring maximum adhesive grip.

2. Align Sensor & Magnet: Peel the protective film from the double-sided tape on the main alarm unit and stick it to the fixed frame; stick the magnetic bar to the moving door/window leaf, ensuring the alignment arrows face each other and the gap between them is under 10 mm when closed.

3. Remove Battery Isolator: Pull out the plastic battery pull-tab from the host unit to activate the circuit.

4. Switch ON & Test: Slide the side toggle switch to ON, open the door/window to confirm the 90dB siren sounds immediately upon separation, then close it and switch to OFF when not required.