Chamberlain CWPIR Wireless Motion Alert Add On Sensor

I am not happy with this purchase. they work fine for a little while and if you change batteries they do not work properly. I have had it trying to make these work. do not order.

These units are more expensive but I figured they'd last. I bought a unit and the range was great, instalation was easy, but the battery life on an average driveway was no where near 2 years, maybe 6 months of light driveway use (about 4 activations a day). But I could get past that if it was durable. Unfortunately it hasn't been. Lately it beeps to indicate low battery with a few weeks of getting fresh Duracell Procell batteries. I changed them out and same problem. Went to change them this time and now it won't even turn back on with brand new batteries. Sounds like an electrical problem to me. I was disappointed by the durability. Had it lasted I would have expanded from 3 sensors to 6 or 7 for the farm, but can't trust them now. I was also looking at driveway gate openers but will have to do more research to see if durability is a problem with those chamberlain products too.

Works very good. Detects the coming and going of people and vehicles.

I have had the system for years and find that it works well. My only problem has been a seasonal sun interference. We use the device for driveway warning and have very few surprise guest.

I live in rural southeast Georgia and have a bad situation with armadillos tearing up my grass in search of grubs. I bought the Chamberlain motion alert system and have had much success detecting these destructive critters in the wee hours of the morning. I mounted the sensor(s) on a flat metal stake about 1 foot off the ground in front of locations where they are digging (I call them "hotspots"). When the alarm goes off at night, I get up, grab flashlight and .22 rifle with red laser sight and take care of business. Its a very effective way of controlling our armadillo population.