Magnetic Door and Window Alarm – 90dB, 2-Pack

Most break-ins happen through a door or window. You don’t always need a full security system to address that. Sometimes the most useful thing is simply knowing the moment something opens—a clear, immediate sound that requires no subscription, no Wi-Fi, and no installation tools. That’s exactly what the Magnetic Door and Window Alarm does, and this 2-pack covers two entry points at once.

Who This Door and Window Alarm Is For

This alarm is a practical fit for renters who can’t drill into walls or install permanent hardware, and for homeowners who want a low-cost first layer on secondary entry points like a basement door or garage side entrance. It also works well for parents who want to know when a child opens an exterior door, travelers who want basic entry notification in a hotel or Airbnb, and small business owners monitoring a stockroom or interior door after hours. If your situation calls for a simple, standalone alert—not a networked system—this fits.

Is It the Right Fit for You?

Choose It If You Want

• Immediate entry detection for hinged or sliding doors and windows
• Adhesive installation with no drilling or permanent changes
• A simple on/off switch for everyday convenience
• A low-cost way to cover multiple entry points without a monthly fee

Consider Another Option If You Need

• Detection for glass breaking without the window opening (a dedicated glass break alarm handles that)
• Remote alerts sent to your phone when you’re away from the location
• Integration with a smart home or security hub

Magnetic Door and Window Alarm Features and Benefits

• 90dB alarm output: Loud enough to be heard throughout a typical apartment or house—comparable to a running blender—without requiring any external speaker or amplifier.
• Two-piece magnetic sensor: One piece mounts on the frame, the other on the door or window. When they separate, the alarm sounds. When they realign, it stops. No calibration needed.
• On/off switch: Flip it off when you want to use the door or window normally. Flip it back on at night or when you leave. No codes, no keypads.
• Adhesive mount: Installs without tools or drilling. Suitable for renters and temporary setups.
• Batteries included: Each unit runs on three LR44/AG13 button cell batteries, which come in the box. Replacements are widely available and inexpensive.
• Compact size: At 2½” x 1¾” x ¾”, each unit sits close to the frame and doesn’t interfere with normal door or window operation.
• 2-pack: Covers two separate entry points out of the box—two complete alarm units, each with its own magnet piece.

How the Magnetic Door and Window Alarm Compares

Here’s how this type of alarm fits alongside two common alternatives shoppers also consider.

Feature	Magnetic Door and Window Alarm	Glass Break Alarm	Door Stop Alarm
What triggers it	Magnetic separation when door or window opens	Sound frequency of breaking glass	Pressure applied to the door from outside
Alarm output	90dB	Varies by model	Varies by model
Installation	Adhesive, no drilling	Adhesive or surface mount	Wedges under door, no mounting
Power source	Included button cell batteries	Battery-powered	Battery-powered
Best for	Hinged and sliding doors and windows	Windows that could be broken without opening	Hotel rooms and inward-opening doors

Care and What’s Included

What’s in the Box

• Two magnetic alarm units
• Two magnet sensor pieces
• Six LR44/AG13 button cell batteries (three per unit, pre-included)

Care

Keep the contact surfaces clean and free of dust so the magnetic connection stays reliable. If the adhesive loses grip over time—especially on textured surfaces—standard double-sided mounting tape works as a replacement. Battery replacement is straightforward: the units take LR44/AG13 button cells, available at most hardware and grocery stores.

Magnetic Door and Window Alarm: Frequently Asked Questions

How loud is the Magnetic Door and Window Alarm?

It produces a 90dB alarm tone when triggered. That’s roughly as loud as a food blender or a busy street corner—clearly audible in a typical room or hallway. It’s not meant to summon neighbors from outdoors, but it’s more than loud enough to alert anyone inside the home and startle someone who wasn’t expecting it.

Does the Magnetic Door and Window Alarm work on sliding glass doors?

Yes. The two-piece magnetic design works on any door or window that moves in a way that separates the two sensor pieces—hinged doors, double-hung windows, and sliding doors or windows all work. The key is mounting the pieces so they align when closed and separate cleanly when opened.

How long do the batteries last in each unit?

Battery life depends on how often the alarm is triggered and how long it sounds each time. LR44/AG13 button cells have a relatively small capacity, so units that are triggered frequently will go through batteries faster. Replacements are inexpensive and available almost anywhere batteries are sold. The on/off switch helps preserve battery life during periods of normal use.

Can the Magnetic Door and Window Alarm send alerts to my phone?

No. These are standalone, local-alert devices. When the sensor is triggered, the alarm sounds at the unit itself—there is no app, no Wi-Fi connection, and no remote notification. If you need alerts sent to your phone while you’re away, a smart sensor connected to a security hub would be a better fit for that use case.

Add Entry Alerts to Two Doors or Windows Today

The 2-pack gives you two complete, ready-to-use alarms right out of the box—batteries included, no tools required. Choose your entry points, peel the adhesive backing, mount the pieces, and you’re set. Add them to your cart to get started.