Door Alarm Sensor, 2 Pack SECRUI Wireless Window Door Open Contact Burglar Alarm Chime Anti-Theft 4 Modes 120dB Loud Enough Sticky pad Easy to Install for Your home Kids Safety Shop Security-White

Had to add a piece to align the receiver with the other part and didn’t find a good way to glue it yet! But if the door with the frame is perfectly aligned then the alarm is easy to fix!

Bought this for my MIL. Dead easy to install with the self adhesive pads supplied. Works over a good distance including through walls. The only downside is that we all have to do the dance of the sugarplum fairy when we go in.

This was just what we wanted. Very easy to install and works well. It is nice and loud when set on full volume. Lots of chimes to choose from, from short tones up to quite long ones. Christmas or birthday can be marked by easily changing the tone.

Fantastic product, just what I needed. It's very loud and does the job

Want to scare the knickers off your family everytime they arrive uninvited? Slap these on the front and backdoor and you can eat your chocolate hob nobs in peace.

I couldn’t get this device to work because the place I wanted to install it was not a standard or flat surface.Useless in my humble opinion on which I wasted my money.I didn’t understand from the product description that the device was so restricted and limited in its application.

Super easy to use/setup and comes with spare sticky pads. Definitely buy again

There brill great peace of mind