Glass Break Alarm – 100dB Vibration Sensor, 2-Pack

Most break-ins happen fast. A window gets hit, and the decision to keep going or run is made in seconds. Mounting a Glass Break Alarm on your windows puts a loud, immediate alert between that first strike and whatever happens next. No wiring, no tools, no installer. You put it up yourself in under a minute, and it’s working.

Who This Window Alarm Is For

This alarm fits renters who can’t modify their apartment, homeowners who want a quick first layer of window security, parents setting up a child’s bedroom, seniors living alone who want simple peace of mind, and anyone moving into a new place who isn’t ready to invest in a full security system. If you have a window you’re concerned about — ground floor, garage, basement, back bedroom — this is a practical, low-cost answer.

Is It the Right Fit for You?

Choose It If You Want

• A no-tools, peel-and-stick install that takes less than a minute
• A loud 100dB alert that activates on vibration from impact or breakage
• Batteries included so it’s ready to use right out of the box
• An affordable way to cover multiple windows without a monthly fee

Consider Another Option If You Need

• A monitored system that contacts a security company or sends phone alerts
• A sensor that distinguishes glass-breaking frequency from general vibration
• Integration with a smart home hub or app

Glass Break Alarm Features and Benefits

• 100dB Siren: At 100 decibels, this alarm is loud enough to startle an intruder and alert people inside the home or nearby.
• Vibration Sensor: Triggers on impact — a strike, a rattle, or a shatter activates the alarm without any physical contact with the sensor required.
• Peel-and-Stick Install: Adhesive backing mounts directly to the window surface. No screws, no drilling, no tools.
• Batteries Included: Three 1.5V LR44/AG13 button cell batteries come in the package so you’re not waiting on a hardware store run.
• Compact Size: At 2½” x ¾” and 0.2 lbs, the alarm sits flat against the glass and doesn’t block your view.
• 2-Pack: Two alarms per order so you can cover a pair of windows at once — ideal for a bedroom and a common area, or two ground-floor windows.
• White Finish: Blends with standard window frames and trim without drawing attention.

How the Glass Break Alarm Compares

Here’s how this vibration-sensor alarm stacks up against two other common window security approaches.

What’s Included and Care Notes

What’s in the Box

• 2 Glass Break Alarm units (white)
• 6 LR44/AG13 button cell batteries (three per unit, pre-included)
• Peel-and-stick adhesive backing on each unit

Care and Placement Tips

Mount each alarm on a clean, dry window surface for the best adhesive hold. Test the sensor periodically by tapping the glass firmly near the unit. Replace batteries when the alarm response weakens or becomes inconsistent — LR44/AG13 cells are widely available at hardware and grocery stores.

Glass Break Alarm: Frequently Asked Questions

How does the Glass Break Alarm know when a window is hit?

It uses a vibration sensor. When the glass it’s mounted on receives an impact — a strike, a hard rattle, or a break — the sensor detects that movement and triggers the 100dB siren. It responds to physical shock transmitted through the glass itself, so it activates at the point of attack, not after the window is already open.

How loud is 100dB, and is that loud enough to matter?

100 decibels is roughly the level of a chainsaw or a loud concert. In a quiet home at night, that’s more than enough to wake people in nearby rooms, startle an intruder, and alert neighbors. It won’t replace a monitored system, but as a first-response alert it does its job.

Does the Glass Break Alarm require any wiring or a hub to work?

No. It’s completely self-contained. The batteries are already included, the adhesive backing is built in, and there’s no hub, app, or Wi-Fi needed. Peel the backing, press it to the window, and it’s active. That simplicity is the whole point for renters, travelers, or anyone who wants coverage without a complicated setup.

Where should I place each alarm for the best coverage?

Mount it directly on the glass, not the frame — the sensor needs to feel vibration through the window surface. Ground-floor windows, basement windows, and any window that’s not visible from the street are good priorities. With two alarms in the pack, focus on the windows closest to entry points or sleeping areas first.

Add Window Security Today

Pick your windows, peel the backing, press the alarm to the glass, and you’re done. Add the 2-pack to your cart and have both units up before the end of the day.