Tested all of them after I installed and they all set off an alarm as expected (when the window was moved and then again when it was slid up).

Work as expected

Work as expected easy to install no problems at all so

Product worked as expected and the alarms are very loud

Worked as expected!

Also when you are home and they fall off it scares the cr@p out of you because you don't know if someone's touching the door or window or if it fell off