Shackcom Door Window Alarm with Remote Control 2 Pack, 130DB Magnetic Burglar Alert Sensor with Battery, 3 Alarm Sounds/Wireless/Low Power Warning Anti-thief Loud Alarms for Your Home Security System

Very easy to fit - but be careful where you place the parts because the self adhesive is very strong! I wouldn't have wanted to try to move them. NOTE - you need to be able to fit the two parts of the alarm so they are almost touching when the door is closed. However, because it is operated with a remote, you can fit the device on the outside or the inside of a door. It also works OK if the two parts are attached to surfaces that are at 90 degrees to each other - for example the flat door surface and the door jamb. So you fit the alarm on many designs of doors, but we have some external doors and windows where I think it would be difficult to find a way of fitting on the inside. Clear, easy to follow instructions. Loud enough to alert people in the flat - but not so loud as to frighten the neighbours. We used it to warn us of any children trying to access the biscuit cupboard late at night!

These are easy to install, work as they should, and are very loud. I only gave these one star short as like all these types of alarms they are too easy to turn off or remove. It would serve to some form of effect even to unnerve and intruder for that moment in time but won't stop them in most cases. I would recommend getting an alarm kit that pushes notifications to your mobile phone.

This was just what I was looking for, a relatively cheap solution for extra security at night. I have used them for doors, though I think you can use them for windows as well. I like that these are small and discrete, especially if you have white doors. Easy to install, you just peel off the backing and stick them on. A switch with 2 alarm sounds and an off button, alarm is loud enough to hear from another part of house, on a par with volume of a smoke alarm.

It is cheap, convenient and does come with 4 alarms and spare batteries for each. It also comes in individual boxes with tas to stick the bits on.It has two alarm sound settings and off an option on a switch on the side which makes it easy to deactivate.It was a bit fidgety to get the right distance to put up. and one of them I've only switched off twice has stopped working within one month of having it up. The other is still going strong although the sound is not very loud anymore and would doubtfully wake me up from a deep sleep.It's not noisy enough to alert anyone passing that the property has been broken into, may be handy for a shed or bike storage as intruder won't be expecting it. But as a main house alarm it's a little underwhelming.

More of a deterrent, no one in the right mind would stick around after setting these off, they are ridiculously loud and would even wake the neighbours .

Pack of 4 vibration alarms, plus extra batteries! They are ready to use as they already have batteries inserted.  It was a bonus to have a pack of extra batteries, thank you.  These are great. They can be placed on windows or doors. Simply peel off the back cover, then stick it to wherever needs to be alarmed. They are small but loud! Being small, they are not cumbersome or unsightly. This is a great deterrent for when a would-be intruder attempts to break a window or kick a door in. These little vibration alarms will immediately sound once they detect a vibration, a knock, or a kick, and then hopefully scare the burglar away.Why have an alarm sound, AFTER the intruder has broken-in? These loud alarms will notify BEFORE the intruder has had a chance to enter the property, or even before they have had a chance to break a window. Great buy. Very happy. Thank you. Highly recommend these for peace of mind.

Great little alarms ,can be to difficult to fit on double glazing windows .you may need to make small pieces of wood to get the contacts to be flush with each other,quite easy to do if you do diy. Alarms and nice and compact and very loud,great value for money

I have an autistic child and she has recently got into getting out of the house ( she is 7) and I have a two year old that keeps opening the bedroom window ,I can’t add locks to the pvc windows or back door and the ones there already are easy to open . this is super loud which will probably irritate the neighbours but it’s very loud that it will alert me to the window or doors being open and will give me more of a heads up . It’s got double sided adhesive so easy to attach to anywhere and it doesn’t have to be perfectly aligned with each other to work.