Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: Would your cat jumping on the window sill set this alarm off?
Document: I was pleasantly surprised to find that this item did an excellent job of detecting any disturbance to the glass. I tested it a few times in some simulations and found that while rapping on the glass door gently would not trigger the alarm, a full smack with the palm of my hand (and think how much harder a baseball bat would be!) would set off the alarm.A purchaser must keep in mind is that this product is intended to detect someone breaking the glass of a window or door. It is not, as other reviewers have suggested, intended for use as a window/door opening detector.In short, the alarm is loud, it is not so sensitive that it will be set off by the cat pawing your door but it is definitely going to let you know if someone is trying to break your glass.
Stuck this on a glass sliding door.... And it works great for me. I hit the window a couple times, nothing... I then hit it a little harder, and the alarm went right off. If I had hit the window any harder, it would have broke for sure. So for me, it works exactly how I wanted it to... Where it won't set off for minimal vibration, but just at that point before the window could be smashed in. Be mindful that I also placed it in the middle of the glass sliding door.
So far, I think these are just great. They go on easy and I've test them to be effective. They are sensitive...even a hard tap on the window would most likely set these off but I'm okay with that.
Great product, easy to use. Was worried would be set of by outside noise/vibrations (bass from cars). No problems. Slam the window with your fist or worse...it goes off. Not too loud but loud enough to wake you up to the issue. Sticker on back looks intimidating as well when stuck to window.
We received these and immediately tested and installed them on two sliding doors that are already secured, but we like the loud noise factor of these small alarms.Unlike others I don't think an intruder would need to crack the glass to set these off, even a good knocking or jostling on the window set them off when we tried them out. Which is exactly is what I expected and received.They set off a loud, shrill wail which we could easily hear from even two floors away.Combined with other security this will add peace of mind to the home.
I bought two of these, one for a window and the other for the sliding glass door. They are small and on the reverse side it has a red logo with a dog. I like that it shows people on the outside that I do have a security system. It is very easy to set up, you just peel off the sticker on the back and stick it on the window. You flick the switch to on and after a couple seconds it beeps to let you know it works. We have had a couple of windstorms the past few days and it never set off the alarm.
I installed three of these alarms on our basement windows. I was concerned at first that the alarms may be too sensitive and get set off at the slightest vibration, but this has proven to not be the case. The alarms will sound if the glass is tapped, but it takes more than a slight vibration. The alarms stick to the window via adhesive so I'm not sure if I will be able to remove and use them again elsewhere. This is probably my only concern at this point. Also, the alarm is loud and will certainly scare off an intruder, however, if your house is large or if you have fans running at night, you might not be able to hear them if they go off.
That is good.A small LED that flashes when the unit is turned on and it sets itself. These would be good to use to protect display items in a store -- paintings and such... anything in which movement is likely to cause vibration would set it off. I got mine for $8 at Lowes Hardware store.
Easy to put on french door window and with a good bump or knock it will sound off. Not as loud as I would like but hopefully the mere presence of the alarm will cause an intruder to stop.
Works perfect if you want something that will detect vibration or minor disturbance on a window. It will still allow you to open and close a window, but will alert you if there is a decent amount of vibration. As far as the decibel level goes, I would compare it to a smoke detector alarm.
Answer: No. You have to hit it pretty hard. My cats are always running into the windows and they never set it off.