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Magnetic Door and Window Alarm 90dB 2-Pack – Peel-and-Stick, Works on Doors, Windows, and Sliders, Batteries Included

SKU: ST-SLAW
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Original price was: $14.91.Current price is: $12.67.

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Two-piece magnetic sensor — one side goes on the door or window, the other goes on the frame. When they separate, a 90dB alarm goes off. That's it. No wiring, no WiFi, no monthly fees. Peel, stick, and protect any entry point in your home in under a minute.
  • Magnetic contact sensor triggers a 90dB alarm when door or window opens
  • Works on hinged doors, windows, and sliding glass doors
  • Peel-and-stick adhesive — no tools, no drilling, renter-friendly installation
  • Batteries included (three LR44 button cells) — ready out of the package
  • 2-pack covers two entry points — compact 2½" x 1¾" x ¾" white units

The Simplest Security You Can Buy

Here’s the deal — this is the most basic, most reliable, and cheapest way to know when a door or window opens. Two magnetic pieces — one on the door, one on the frame. When they separate, the alarm sounds. No internet connection, no app, no subscription, no base station. It’s a concept that’s been around forever because it works forever. And at this price for a 2-pack, there’s no reason every entry point in your place shouldn’t have one.

Who This Alarm Is For

Apartment renters who can’t modify the property but want some security. Parents who want to know when a child opens a door or window. Homeowners adding a cheap layer of protection alongside an existing system. Dorm rooms, Airbnb properties, storage units, sheds — anywhere you want a simple alert when something opens that shouldn’t. If you want to know when a door or window moves, this is the most affordable way to make that happen.

Is This the Right Choice for You?

Choose the Magnetic Door/Window Alarm if you want:

  • The most affordable entry-point alarm available — covers two doors or windows
  • Universal fit — works on standard doors, windows, and sliding doors
  • Zero-skill installation with no tools or wiring required

Consider something else if you need:

  • Louder volume — the door stop alarm hits 120dB for maximum noise
  • Glass break detection — the vibration-based glass break alarm is better for windows at risk of being smashed

How It Works (It’s Not Complicated)

One magnetic piece sticks to the door or window. The other piece sticks to the frame, right next to it. When the door or window opens, the two pieces separate, the magnetic contact breaks, and the 90dB alarm triggers. Close the door, the magnets realign, and the alarm stops. That’s the whole system.

90 decibels is about as loud as a lawn mower — plenty to wake you up at night, alert your neighbors, and make an intruder rethink their plans. It’s not going to shatter eardrums, but it doesn’t need to. The point is awareness and deterrence, and 90dB delivers both.

Quick Comparison: How Does a Door Alarm Stack Up?

Feature Door/Window Alarm Motion Sensor Security Camera Barking Dog Alarm
Setup Peel and stick ✓ Mount and aim Install + WiFi Plug in and aim
Monthly Fees None ✓ None ✓ Often required None ✓
Detection Type Contact — door/window opens ✓ Movement in room Video motion Radar through walls ✓
Portability Travel-friendly ✓ Semi-portable Fixed install Semi-portable
Best For Entry points, travel Room coverage Recording evidence Whole-house deterrent

Practical Details

Each unit measures 2½” x 1¾” x ¾” in white plastic and weighs 0.2 pounds. Batteries are included — three 1.5V LR44/AG13 button cells per unit. Adhesive backing for peel-and-stick installation. Made by Safety Technology with a 1-year warranty. Two units per package.

This is the kind of thing you should’ve bought a year ago. The good news is it takes about 60 seconds to fix that.

Frequently Asked Questions

Will this work on a sliding glass door?

Yes. Place one piece on the sliding door and the other on the frame where they meet when closed. When the door slides open, the magnets separate and the alarm triggers. Same concept, same result.

Can my cat or dog trigger it?

Only if they open the door or window. This is a magnetic contact sensor — it only triggers when the two pieces physically separate. Pets walking by, bumping into doors, or lying near windows won’t set it off.

How does the adhesive hold up?

The adhesive is strong and designed for long-term placement on doors, windows, and frames. Clean the surface with rubbing alcohol before you stick it on for the best hold. It’ll stay put for years under normal conditions.

ManufacturerSafety Technology
Decibles90 db
BatteryThree 1.5V LR44/AG13 Button Cell (Included)
ColorWhite
Warranty1 year
Weight0.2 lbs
Dimensions2 ½” x 1 ¾” x ¾”

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