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 Kevin Duhon

Nothing to assemble, and setup instructions are pretty straightforward.Two sirens going off at the same time can get the attention of anyone a few hundred feet away; they are pretty loud. One control device can be used for both alarms although I find that controlling both can be tricky.Update: After six months, batteries signaled low power. After battery change on one of them, alarm goes off unstoppable. Makes me wonder, is there a problem that is endemic to the alarm unit or is it possible that it had been tampered with remotely?