Window Alarm System 4-Pack - Ultra-Loud 120dB Alarms with Advanced Vibration Sensors - Window Security Alarms for Glass Break Detection - Features Low Battery LED Indicator

I have this alarm on all my windows, my front door, my garage door. Let me tell you this product is so awesome and super loud. Perfect for front line of defense for your front door, garage door and all your windows. I highly recommend put one on your door and the garage door. If someone try to kick in the door, the alarm is so loud that it will wake you up and scare off the intruders. There is a blinking red flash every two seconds on it just like your car alarm, but some how the battery just last forever

They work great, bought as an extra precaution for my windows

We purchased these for an RV road trip through Washington knowing that the trailheads are often targeted inside the national parks. I accidentally set them off a couple of times and they are LOUD. I specifically purchased these ones because they are extremely easy to spot from the outside and they have a flashing light that couldn’t be missed at night. My only critique would be that they cannot be easily removed once attached (which might be a good thing for some people). Our RV was a rental so they needed to come off and I had to pry them so hard I was nervous it would bust the window. It would be a good option to have some that suction on instead.

This window alarm is awesome! Loud enough when the alarm goes off.

These alarm items are smaller then it's advertising but hold a powerful punch. Definitely worth buying.

I tested them and they don’t always work.

Work fine stay at window-very loud

Product works well