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Glass Break Alarm 100dB Vibration Sensor 2-Pack – Peel-and-Stick Install, Battery Included, Window Security

SKU: ST-GLASS
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Original price was: $17.91.Current price is: $15.22.

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Stick it on a window, forget about it, and let it do its job. These glass break alarms use a vibration sensor that detects when glass is hit, cracked, or broken — then they fire off a 100dB siren. Two per pack so you can cover more windows without buying twice.

  • Vibration sensor triggers on impact — detects hits, cracks, and breaks instantly
  • 100dB siren alerts everyone nearby and scares off intruders
  • Peel-and-stick installation — no tools, no wiring, done in 10 seconds
  • Batteries included (three LR44 button cells) — ready to use out of the package
  • 2-pack covers twice the ground at just 2½" x ¾" per unit — small and unobtrusive

Cheap Insurance for Every Window in the House

Here’s the deal — most break-ins happen through windows, and most people do nothing about it. These glass break alarms cost less than a pizza and take 10 seconds to install. Peel the adhesive backing, stick it on the window, and if anyone hits, cracks, or shatters that glass, a 100dB siren goes off. It’s not a full security system, and it doesn’t pretend to be. It’s a loud, cheap, effective layer of defense for the entry points most people ignore.

Who This Alarm Is For

Apartment renters who can’t install a wired alarm system. Homeowners who want to cover ground-floor windows without spending hundreds on sensors. Small business owners who want an extra alert on storefront glass. Anyone with sliding glass doors or large windows that are obvious entry points. If you’ve been meaning to do something about window security and keep putting it off because it seems expensive or complicated, this solves both problems.

Is This the Right Choice for You?

Choose the Glass Break Alarm if you want:

  • A vibration-based sensor that detects glass being hit, not just broken
  • The simplest possible installation — peel and stick, batteries included
  • Two units per pack to cover multiple windows at once

Consider something else if you need:

  • Door protection — check the magnetic door/window alarms or door stop alarm
  • Louder volume — the door stop alarm hits 120dB if maximum siren is your priority

Simple Tech That Just Works

There’s no app, no WiFi, no base station. The vibration sensor inside each unit detects physical impact on the glass it’s attached to. It doesn’t care about sound or motion — it cares about vibration. That means it won’t go off because a truck drove by or your kid slammed a door. But tap on that window hard enough, and the 100dB siren starts screaming.

Each unit is just 2½” x ¾”, which means they’re barely noticeable on the glass. They run on three LR44 button cell batteries — included — and draw almost no power when they’re just sitting there waiting. Replace the batteries once or twice a year and you’re covered.

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 pack includes two glass break alarm units with batteries installed. They’re white, measure 2½” x ¾”, and weigh 0.2 pounds total. Adhesive-backed for peel-and-stick installation on any glass surface. Powered by three 1.5V LR44/AG13 button cell batteries, included. Made by Safety Technology.

For the price of two coffees, you can put a 100dB alarm on every ground-floor window in your apartment. There’s no reason not to.

Frequently Asked Questions

Will this go off from wind or vibrations in the building?

No. The vibration sensor is calibrated for the kind of impact that comes from someone hitting or breaking glass. Normal building vibrations, wind gusts, and street noise won’t trigger it. It’s looking for sharp, direct impact.

Can I remove and reposition them?

The adhesive is strong enough for permanent placement. You can remove them, but you may need new adhesive to reattach. Think of this as a set-it-and-forget-it install on the windows you want covered.

How long do the batteries last?

The units draw almost no power in standby mode. Under normal conditions, expect a year or more before you need to swap batteries. LR44 button cells are cheap and available everywhere — keep a few spares in a drawer.

ManufacturerSafety Technology
ColorWhite
Decibles100 db
BatteryThree 1.5V LR44/AG13 Button Cell (Included)
Weight0.2 lbs
Dimensions2 ½” x ¾”

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