Door Alarms When Opened, 4 Pack Noopel 120DB Loud Pool Alarms for Doors, Window Alarm Sensors for Kids Safety, Burglar Entry Alert for Home Security

Summary: Noopel & GE recommend, Sabre DON’T recommend.I live in a mixed urban neighborhood and my new apartment has more windows such I shopped for additional alarms to augment the Sabre & GE brands I already had buying first more Sabres, then because the Sabre units performed badly I purchased several Noopel units.I’ll start with Sabre Wireless Home Security Alarm as I have the most of these. I purchased them on the basis of Amazon reviews at two intervals a year apart such I have experience with them. I found them WEAK & VARIABLE. Even on the stronger units the alert isn’t enough to wake me if sleeping, many units have such a weak alarm that I might not hear it in another room with the TV on.Sabre’s weakness prompted me to return to Amazon for an alternative and I bought Noopel Magnetic Entry Sensor as a replacement. BIG difference, these you can hear at a level likely to chase an intruder off and alert the neighbors to turn on their lights. I liked these enough that I repurchased more as Sabre replacements.GE Personal Security Alarm – Earlier I had purchased a pack of GE’s from Amazon and have over a year’s experience with them and would recommend. They still have a loud shriek and would serve their purpose to scare an intruder and wake you to the danger.ON/Off placement. The 3 brands differ in where they locate the on/off switch with Noopel and GE placing theirs on the outside for easy access. Sabre locates their switch on the INSIDE such you must take the battery cover off to access the switch – both awkward and easy to lose your batteries. The Noopel & GE placement is superior in my judgment.Overall I’m disappointed in the Sabre’s I bought. In fairness I tried new batteries and purchased more than one set a full year apart – no volume, no deterrent. Noopel is new and I can’t comment on longevity, but out of the package – they WORK. GE I have long experience and they have both better design & better performance than Sabre.

I am a social worker who received referrals from CPS for families that didn’t need CPS involvement, but needed help with resources in our Community. Many of our clients were families with autistics kids. I developed kits to include these alarms along with replacement batteries for the alarms. I helped install these above the door frame if possible. The alarm is very loud and alerts parents if the doors open. Beware some kids will try to use a chair to turn off the alarms is the reason I tried to install them at the highest position possible. I would not go to sleep and rely on the alarm to wake me up if my child tried to open the door. But it does provide an extra layer of security to protect and monitor your child. Highly valuable for autistic parents.

Easy install, and very loud for the price you can’t complain, but if your door and the door frame do not match up, it will not work. They have to be flush with each other.

These were purchased to let me know when a "guest" opens drawers in my bathroom.They work. Well. They work very, very well.The installation was easy, the adhesive has adhered so well that I don't think it's going to be easy to remove and because of their size, they fit into small spaces where no one will easily locate.The alarm is a high, screeching wee, woo, wee, woo and will cause panic in anyone close by. So far the batteries seem to be holding up well, but I have to make sure no one is home to check.

Have to replace batteries every 3-4 months. Even Duracell and Energizer lasted 4 months. Hard to replace batteries. When replacing very difficult trying to hold one battery in while trying to install the other two batteries 3 total. Very tedious. Buy something elseThey do work well (loud) after installing the batteries.

These alarms work very well. Very loud and will definitely let you know when someone opens the window or door. They are also small so they don't look clunky on your windows. Would definitely buy again.

Very loud but batteries have to be changed often. Maybe every couple weeks.

Our great grandson has autism so the need to be alerted if the door is opened. This product works very well.