Pack of 8 Magnetic Door and Window Security Entry Alarm System WirelessMini Alarms Burglar Intruder Entry Warning Sensors White (Battery Included)

Great product for the price. So easy to install, sticky back can be fitted anywhere and has stayed up with no incidents of it coming off. Looks discrete, very loud even put one on my hut door outside. Little cost for feeling safe.

They did not work, absolute waste of money. Threw them in the bin.

Excellent items. The alarms can be heard from the ground floor to the second floor which is more than adequate for us, as well as by neighbouring properties. I tested each item (wearing earplugs!) and all eight of them worked perfectly. Installation was a breeze thanks to the included batteries, double sided tape and guide arrows. The magnet is not tooooo sensitive so if your surfaces are not entirely level this item should still work for you, although the alarm will ring out loud and clear if moved about 1.5cm away from the starting position. The small part is only 12mm wide which makes it absolutely ideal for attaching to the outer (moving) part of sash windows. Placed on the middle beam of such a window, the design is not an eyesore if your windows are painted white yet conspicuous enough that they may easily put a potential burglar off trying the window in the first place. If you can deter a burglar that's half the battle: once that crowbar is on your window you have to deal with repairing the chipped paint and feeling scared about being in your own home! If you want to open the window you simply need to flick the switch to "OFF". Whenever the batteries run out they should be very easy to replace with the alarm still in place thanks to the placement and design of the battery compartment.In my opinion these are not ideal as door alarms unless for a patio/back garden door where no one should normally enter and you think you'll remember to put the switch to "OFF" before opening the door from inside. This is because there's no way to stop the alarm from going off once the switch is set to ON (apart from closing the door/window, or turning the alarm OFF). It's a simple device at the end of the day (which is how the price can be so compelling), but I believe it is perfectly effective and fit for purpose!

Bought for grandparents to secure house in country. As it does not need any internet or other type of connectivity or devices, it is “generation proof”.Fits the intended purpose and it has an ear-piercing noise, exactly what is need to scare away any intruders in the middle of nowhere and alert the far away neighbours for help.

These do a reasonable job for the price paid. Sadly a few of ours came with magnets missing, and it must have been fairly obvious to see when they were being packaged, yet they were still sent. We couldn’t return, as we were going on holiday for a few weeks & we couldn’t return when back home either as window for returning had passed. The ones that worked did the job intended, but some fell from doors (sticky backs weren’t strong on some surfaces) and some broke by repeatedly switching on and off to use, but these are a cheap price and therefore cheap quality, so overall reasonably satisfied. I don’t expect they would last long, but we only needed for 3 weeks.

Got for extra protection on doors. Louder alarm than expected

Small enough to not see from outside and makes a loud enough noise to deter anyone

I had some of these years ago and they were great. These ones aren't great..... Most of the pack are way too quiet when going off or don't work. Not sure if I got a bad batch or the batteries are dud but I specifically got them for going away for the week for peace of mind and for general security. Very very disappointed with these! They would be brilliant if they actually worked properly, makes them pointless that they don't!