Window alarm with vibration sensor - Loud 130dB alarm & easy installation - Great to protect your Home, Office & RV from burglars - Triggers alarm when window gets smashed - Pack of 6, Silver/Black

These were bought for security. They are very sensitive to knocks but that’s what you need to deter criminals. The decibel level is great for such a great value product

Value for money good item

Peal the backing off and stick on your vulnerable glass windows and patio doors.. Quite loud but fortunately never been set off in anger.

Took 1 star 🌟 off for sensitivityHonestly you tap the windowThat's enough to set these off..my son keeps slamming the back door..this sets the window alarms off that are separated by a 3ft wall

I use these overnight. I put them on just as I am about lie down and as yet I have not set them off. Although not on during the day (because I have to slam the final door shut to lock it) I feel they are a bit of a deterrent due to the fact they are very visible on the windows. As there is only me and my dog in the van at night there is little movement but a family in a van may cause too much vibration for them. But for general everyday use when leaving the vehicle, (providing you do not slam the doors) I would recommend them.

Ok product

It is very easy to install, they come with batteries so you don’t have to purchase them separately, all in all it took me 30 seconds to install them on the windows. They are so loud, I sleep with earplugs in on the second floor with a closed door and I still woke up to sound when my boyfriend accidentally triggered the alarm. If I knock on the window it triggers them, but raining doesn’t so I am very satisfied. It is also excellent value of money. I think it’s such a minimal effort and investment for your safety that everyone should get them.

One of the six allarms does not working and spoiled my mood.Overall the quality of the product is goodAlthough there are no instructions were is preferable to install it with result the first one to be misplaced and it is not easy to remove it afterwards.The volume is moderate but sufficient , i think , especially at night!I thought that I could connect with Alexa or iphone but there are no wifi skills . Just the alarm of the device.