Glass Break Window Alarm – 100dB, 2-Pack, Peel-and-Stick

Most people lock their doors and call it a night. But a locked door and an unprotected window are two very different things — and anybody who has thought about it honestly knows which one a determined person is going to test first. That quiet rattle at 2 a.m., the subtle pressure on a pane of glass — that is what the Glass Break Window Alarm is built to answer. It sits flat against your window, invisible in the routine of your day, and the moment it feels that vibration, it fires 100 decibels straight into the room.

Who This Window Alarm Is For

This two-pack is made for renters who cannot drill into their window frames without risking their deposit. It is made for seniors living alone on the ground floor, parents who want a second layer on a child’s bedroom window, and homeowners who want coverage on a side window or back room without paying for a whole monitored system. If your building has a shared entrance and your unit faces an alley, a parking lot, or a fire escape — this is for you. No technician required. No contract to sign.

Is It the Right Fit for You?

Choose It If You Want

• Instant installation — peel the backing, press to glass, done in under two minutes
• Zero ongoing cost — no subscription, no Wi-Fi, no app to manage
• Coverage for two windows at one low price with batteries already included
• A solution that works in a rental without touching the frame or the sill

Consider Another Option If You Need

• A sensor that also detects a window being opened, not just struck or rattled
• Remote notifications sent to your phone when you are away from home
• Integration with a larger smart home or monitored security system

Glass Break Window Alarm Features and Benefits

• 100-decibel vibration alarm: Triggers when the glass is struck or rattled — that is loud enough to wake a sleeping household and loud enough to give anyone on the other side of that window serious second thoughts
• Vibration-sensing trigger: Responds to physical contact with the glass rather than air movement or sound, which means fewer false alarms and a real alert when something actually happens
• Peel-and-stick mount: Adhesive backing bonds directly to the glass surface — no drilling, no screws, no damage to your window frame or your security deposit
• Batteries included: Three 1.5V LR44/AG13 button cell batteries come inside the unit — open the box, stick it to the glass, and it is ready to go
• 2-pack coverage: Two alarms in one purchase means you can protect a bedroom window and a living room window, or two ground-floor entry points, right out of the box
• Compact, low-profile design: At 2½ inches by ¾ inch and just 0.2 lbs, it sits flat against the glass — present enough to serve as a visual deterrent, unobtrusive enough to leave up year-round
• No monthly fees or monitoring required: This alarm works entirely on its own — no app, no Wi-Fi, no contract

How the Glass Break Window Alarm Compares

Here is how this alarm stacks up against two other common approaches to window security.

Care and What’s Included

What’s in the Box

Each purchase includes two Glass Break Window Alarms, each with three 1.5V LR44/AG13 button cell batteries pre-installed. Nothing else to order before you can use them.

Care and Placement

Press firmly to a clean, dry glass surface and let the adhesive set for a few minutes before testing. Keep the sensor away from direct moisture. When a battery eventually needs replacing, standard LR44 or AG13 button cells are widely available at any pharmacy or hardware store.

Glass Break Window Alarm: Frequently Asked Questions

What sets off the Glass Break Window Alarm — does it trigger on loud noise or air movement?

The alarm responds to physical vibration in the glass itself, not to sound or air movement in the room. That means a loud TV or a passing truck will not set it off. It is looking for the specific vibration pattern of someone pushing on, striking, or rattling the window pane. That distinction keeps false alarms low and real alerts meaningful.

How loud is the Glass Break Window Alarm?

It sounds at 100 decibels — roughly the level of a motorcycle engine at close range. That is loud enough to wake people in adjacent rooms, loud enough to carry into a hallway or a neighboring unit, and loud enough to make most people abandon whatever they were doing and leave the area quickly.

Can I use these alarms in an apartment without damaging anything?

Yes. The peel-and-stick adhesive mounts directly to the glass surface without touching the frame, the sill, or the wall. There is no drilling, no wiring, and no permanent alteration to the window. When it is time to move, remove the alarm carefully and clean any residue from the glass. Most renters have no issue with standard adhesive residue removal.

Do I need Wi-Fi or a smartphone to use these alarms?

No. These alarms are completely self-contained. There is no app, no Wi-Fi connection, no hub, and no account to create. The sensor detects vibration, the alarm sounds locally, and that is the entire system. If you want phone notifications when you are away from home, you would need a different type of sensor that connects to a smart home platform.

Add This Window Alarm to Your Home Tonight

Two windows. Two alarms. Batteries inside. Fifteen dollars and about four minutes of your time. Pick the windows that matter most to you — a ground-floor bedroom, a window that faces an alley, the one that has always made you uneasy — and put one of these on each of them. Add both to your cart and let tonight be the night you stop thinking about it.