Window & Door Alarm: Battery Operated; Compact; White

It never worked. Replaced the battery and still didn’t work

I knew Katerina was going through my things... "borrowing" clothes when she thought I wasn't watching her. I bought Intrudalert, set it and waited. While I was watching TV in the living room, the alarm sounded. I rushed up and Katerina was standing in the hall... looking shocked and embarrassed. I confronted her and she moved out not long after. Witch. Thanks Intrudalert!

WHEN I INSTALLED NEW WINDOWS IN MY HOME, I BOUGHT 4 PAIRS OF THESE FOR THEM. IT WORKS, AND THE SOUND IS VERY LOUD. WELL WORTH THE PEACE OF MIND.

09/15/16I have 10 of these, some purchased back in 2008 and I have been using this device for 8 years....they work !!!! ....period !.......2 things to check for operation1.) You have to make sure the batteries are good2.) You have to make sure you set them up correctlyit's a rather simple setup between a opening such as a door or windowthe way they work, when the circuit/door/window/etc is opened, the alarm will sound....loud ! about 80-100 decibelsI use these on my home, travel trailer doors and mostly a lot of campingwhile camping, i setup a perimeter around my campsite using fishing line low to ground for a trip lineand another about 1 foot off the ground.....this method has worked for me when bears entered my campsite perimeterit makes a loud pitched noise which scared the crap out of them....has worked for wild bore hogs, racoons, and manyother critters that roam in the night....Batteries have varied in length of time, depending on the manufacture of batteriesand how long they have sat on someone's self before they are sold to you.the device is made rather cheap, but if you handle with care and they will last you as long time.I have never had one fail in 8 years.They are not waterproof or even water resistant, however i use a cheap ziplock type of bag to protectagainst water when out doors and setting my trip lines. Requires no wiring.There is an on/off switch to activate or deactivate it and uses 3 Lithium ion batteries.I also have a different brand and work as well, GE Personal Security Window/Door Alarm 45115.Hope this helps !

Just bought at Walgrees for 5 bucks, doesn't work, no directions

I just bought two, they are crap. Only made sound two out of twenty times I tested it, and only sounded alarm for two seconds. 1 star is an overstatement