CATSONIC Premium Window Alarm Device Set - Extra Loud 130dB Alarm & Vibration Sensors - Universal Compatibility & Easy Installation - Great for Home, Office & RV Security (6 Set Black)

works great, price is right. added security to home

The media could not be loaded.  It's really easy to paste this products on all my home windows, price reasonable, alarm sound very loud to get attention, love it.

Peel off paper from the back, stick to window, pull out the plastic tab to allow battery contact, press button, and wait 5 seconds for a little chirp sound. That chirp sound tells you the sensor is active.To test, thump on the window with your knuckle. In all six cases, the sensors sounded after giving the window one sound trump with my knuckle. I then pushed the button to turn off the sensor, pressed the button a second time, and waited 5 seconds to hear the chirp, indicating the sensor was active again.

These are awesome though kinda quiet. Well they are great unless you experience a bad thunderstorm and they go off or when your husband kills a fly on the window and they go off waking the newborn. But that is life nothing is perfect otherwise I sleep more peacefully knowing if our windows are messed with I will know.

As far as functionality goes, these alarms most definitely work. Even the slightest vibration will set these things off and they are super loud so they are sure to scare anyone away who might be attempting to break in.The problem is that they are overly sensitive and go off for the slightest reason. Even the slight vibrations that occur on my windows when my dog barks sets them off and it is a real pain.The installation is a breeze and pretty self explanatory. The adhesion on the back of the alarms are durable and I've had no trouble with any of them falling off so thats a good point.Unfortunately we are looking to go ahead in just replace these because they are not very convenient. We have to turn them off during the day because any noise sets them off and most of the time we forget to turn them back on.Another thing that bothers me is that when the alarms go off the siren goes on and on and does not turn off, draining the battery.