Know immediately when doors or windows open. These magnetic alarms sound a 90dB siren when the two-piece magnetic contact is broken—simple, reliable entry detection for any home.
Who This Alarm Is Best For:
- Homeowners wanting basic entry alerts
- Parents monitoring kids’ door usage
- Renters needing no-install security
Is This the Right Security Option for You?
Choose this door/window alarm if you want:
- Budget entry detection (2 for $13)
- Simple magnetic sensor technology
- Works on doors, windows, and sliders
- Easy on/off control
Consider something else if you need:
- Glass break detection → Glass Break Alarm
- Travel portable → Door Stop Alarm
- Louder alert → Door Stop 120dB
Simple Magnetic Technology
Two pieces—one with the alarm, one magnetic. Mount them close together on door/frame or window/frame. When they separate (door or window opens), the 90dB alarm sounds. Simple, proven technology.
Versatile Entry Protection
Works on hinged doors, sliding doors, windows, and sliding glass doors. Anywhere you have two surfaces that separate when opened, these alarms can provide detection. The adhesive mount adapts to any surface.
Quick Comparison: How Does the Door/Window Alarm Stack Up?
| Feature | Door/Window 2pk | Glass Break 2pk | Door Stop | Door Guard |
|---|---|---|---|---|
| Detection | Magnetic open ✓ | Glass vibration | Door pressure | Door vibration |
| Decibels | 90dB | 100dB | 120dB ✓ | 98dB |
| Mount | Adhesive ✓ | Adhesive | Floor wedge | Hang on handle |
| Price | $13/2 ✓ | $15/2 | $7.95 | $9 |
| Best For | Entry points | Windows | Travel | Quick setup |
Practical Details
90dB siren. Measures 2.5″ x 1.75″ x 0.75″. Weighs 0.2 lbs for both units. Includes three LR44/AG13 button cell batteries per unit. On/off switch for easy control. White color. 1-year warranty from Safety Technology.
Budget entry protection, two-pack value. Order today.
Frequently Asked Questions
How far apart can the pieces be?
They need to be close—within about 0.5 inch when closed. The magnetic connection must be strong enough to keep the alarm silent when door/window is closed.
Can I turn it off temporarily?
Yes. The on/off switch lets you disable the alarm when you want to open doors without triggering. Just remember to re-arm it.
Will this work on a sliding glass door?
Yes. Mount one piece on the sliding panel and one on the frame. When the door slides open, the pieces separate and the alarm sounds.







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