Review on Wsdcam Wireless Door Alarm With Remote 2 Pack, Battery Included, 105 DB Loud Pool Door Alarm, Wireless Door Open Alarms Sensor For Kids Safety Home Security by Adam Aponte

I bought these to alert ME if/when my 86 year old dad with dementia opened a door he wasn't "supposed" to. They were very easy to install, and have worked great. I installed rechargeable batteries, and they work just fine. I installed four alarms, and it's been very handy to have the two external door alarms set to one remote, and the two internal doors set to a separate remote (so I can set them independent of each other.) I was also pleasantly surprised by how loud they are; they awaken me even from the bedroom (with the door open at night). Good value for the money.