Door Alarm, Door and Window Alarms, TFLASH Home Security Ultra-Slim Door Window Burglar Alarm with Loud 120DB Siren Song (4 pack)

quite dissapointed. one did'nt work at all even though i changed batteries. two others had low batteriesso i had to buy some more. the batteries are quite difficult to change even when lying flat on a table.almost impossible when "in situ". when working they are quite good, very loud alarm. BUT, once thebatteries run down i face the challenge of changing them again. will probably have to take themdown, do it on a table and then re-install them again with double sided tape or velcro.i just hope they last a long time.

You stick the large part onto your door, and the smaller part onto the door frame beside it. When armed, opening the door (and therefore moving the parts away from each other) will set off the alarm.I'm very happy with these alarms; I've used some on my windows, and on one on both my front and back door. I feel safer. The little red light flashes to show when the alarm is running out of battery, and the sticky stuff on the back is very strong!

Exactly what I was looking for. So easy to attach and the sound is really shrill and loud. This is added protection even if you have an alarm system like we do, we don't always turn it on while we are upstairs so great to hear if there is an intruder.Like it so much I have reordered another packet.

We have used these alarms on our back and front doors, they are very easy to fit.They omit a very high pitch noise which will act as a deterrent and or attract attention. They help to provide a safe and secure home and peace of mind.

I found these as described. Easy for me - a mere female!!! - to attach to the given doors and windows.They will certainly alert all if anything happens. GREAT.

Very loud. But don't stick on for long . 1 of them fell off making the alarm go off . Being on my own I thought someone had got in . Rang police.!!!! Only for them to come and shout up to me it was the room alarm that had gone off . But no one was in my house . But apart from that very good sound .

I was a bit hesitant about buying the door alarms at first but once they were fixed they were really good, they are very affective and they are very loud they work each time is open and stop when the doors are closed. Very impressed with these alarms and would recommend to anyone who wants a quick fixing and user friendly device.

These work but don’t fit the type of windows doors I have as the connectors are too small. What is needed are some extra thicker plates on the smaller to bring both parts meeting better