Magnetic Door Window Alarm 90dB 2-Pack – Battery Powered Home Security System – Easy Install, No Wiring – Entry Point Protection

You check the locks before bed, but what happens at 3 AM when you’re asleep? Most break-ins happen through doors and windows that look secure but give no warning when breached. These magnetic alarms put an instant 90dB alert between you and an unwelcome visitor.

These work best for people in apartments, rental properties, or homes where hardwired security isn’t practical. Parents use them on kids’ bedroom windows. College students protect dorm rooms. Anyone who needs to know immediately when a door or window opens without calling a security company or running wire through walls.

Each alarm splits into two pieces — the main unit with the 90dB siren and the magnetic sensor. When the magnet moves more than half an inch from the main unit, the alarm sounds. Mount them on any door or window in under two minutes. No tools, no wiring, no monthly fees.

Key Features & Benefits

• 90dB Piercing Alarm — Loud enough to wake you and alert neighbors, but won’t damage hearing at close range
• Magnetic Trigger System — Activates instantly when door/window opens, no delay or false alarms from vibration
• Adhesive Installation — Strong 3M tape mounts to any surface in seconds, removes cleanly when needed
• Compact Design — Each unit measures 3.1″ x 1.6″ x 0.8″, fits discreetly on door/window frames
• Battery Powered — Uses standard AAA batteries, 12+ month life span with normal use
• Two-Unit Coverage — Protect your most vulnerable entry points with one purchase

Practical Details

Each alarm includes the main unit, magnetic sensor, adhesive strips, and mounting screws for permanent installation if preferred. The on/off switch lets you disable the alarm when you’re entering normally. Works on doors, windows, cabinets, or any surface where you need breach detection. Check your lease agreement before installing in rental properties.

Two alarms give you coverage where you need it most — typically the front door and a ground-floor window, or two bedroom windows for parents monitoring kids. Start with your most vulnerable entry points and expand coverage as needed.

Frequently Asked Questions

How sensitive is the magnetic trigger?
The alarm activates when the magnet moves more than half an inch from the main unit. This prevents false alarms from normal vibration while ensuring it triggers the moment a door or window actually opens.

Will this work on sliding doors and windows?
Yes, as long as you can mount both pieces so the magnet pulls away from the sensor when the door/window slides open. Works on any entry point where one part moves and one stays stationary.

How do I turn it off when I want to open the door normally?
Each unit has a small on/off switch. Flip it to off before opening, then back to on when you want protection active again. Some people leave bedroom window alarms on 24/7 since those shouldn’t open unexpectedly.

What happens when the battery runs low?
The unit will chirp periodically to warn you before the battery dies completely. Replace with standard AAA batteries — most users get 12-18 months of normal use per battery set.