Windows are vulnerable entry points. These glass break alarms detect break-in attempts with a 100dB siren that alerts you and draws attention to the intruder. Two units cover your most vulnerable windows.
Who This Alarm Is Best For:
- Homeowners wanting budget window security
- Business owners protecting storefront glass
- Renters who can’t install permanent systems
Is This the Right Security Option for You?
Choose this glass break alarm if you want:
- Budget window protection (2 for $15)
- No-install adhesive mounting
- Vibration detection technology
- Batteries included ready to use
Consider something else if you need:
- Door protection → Door/Window Alarm
- Portable travel → Door Stop Alarm
- Louder alarm → Door Stop 120dB
Vibration Detection Technology
The sensor detects the specific vibration pattern of glass breaking or being forcefully impacted. When someone tries to smash your window, the 100dB alarm sounds immediately—alerting you and drawing unwanted attention to the intruder.
Simple Adhesive Installation
No wiring, no tools, no drilling. Peel the adhesive backing and stick it directly on the window glass. Arm it and walk away. Perfect for renters or anyone who wants simple, effective security without installation hassle.
Quick Comparison: How Does the Glass Break Alarm Stack Up?
| Feature | Glass Break 2pk | Door/Window 2pk | Door Stop | Door Guard |
|---|---|---|---|---|
| Detection | Glass vibration ✓ | Magnetic open | Door pressure | Door vibration |
| Decibels | 100dB | 90dB | 120dB ✓ | 98dB |
| Mount | Adhesive ✓ | Adhesive | Floor wedge | Hang on handle |
| Price | $15/2 ✓ | $13/2 ✓ | $7.95 | $9 |
| Best For | Windows | Doors/Windows | Travel | Quick setup |
Practical Details
100dB siren. Measures 2.5″ x 0.75″. Weighs 0.2 lbs for both units. Includes three LR44/AG13 button cell batteries per unit. White color blends with window frames. 1-year warranty from Safety Technology.
Budget window protection, two-pack value. Add to cart today.
Frequently Asked Questions
Does it trigger on knocking or tapping?
It’s calibrated for break-in force, not light tapping. Normal window activity shouldn’t trigger false alarms, but severe impacts will.
Where should I place it on the window?
Stick it directly on the glass pane, preferably in a lower corner. The sensor needs to be on the glass itself, not the frame.
How long do the batteries last?
Button cell batteries in standby mode last many months. The alarm only uses significant power when triggered.







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