Bests & Worsts Reviews from Amazon

Update April 17, 2022, still working and we lovel this alarm. Were still using it on our front steps to let us know when someone is here.. ups, fedex,or just a visitor. This review is for Htzsafe Solar Driveway Alarm System-1/4 Mile Long. I have attached some pictures for Size reference. The unit is placed next to a standard size mouse. I have also attached pictures of the unit mounted on my front Steps, and on a Tree next to my driveway. Also a picture for distance from my house where the sensor stopped working, and picture of how the sensor attaches (ball and socket ). So far, I have not encountered any problems with this sensor / alarm unit. It mounts easily with 4 screws. One caution, The screws are a bit soft so the Phillips head can strip out. I actually emailed HTzsafe about it, and they said, they were going to send better screws with the sensors to avoid that problem. When setting the sensor on the tree, I used a large exersize ball to roll through the detection zone, this worked very well, and now I avoid any critters wandering through in the night. (cats, Possums, small dogs .. you get the idea) at first i had it set to low, and was woken up several times. I tested it on my steps and found that even though the area is constantly in the shade, and also with overcast rainy days, the power was always there to ring the alarm. If your wondering about the distance it can be placed from the receiver, the picture I have attached of the road, you can not even see my house, it is actually around a curve that you can not even see. I measured the distance with a phone app, and it measured out at .23 miles .. almost the advertised 1/4 .. but it had to fight through trees and through that curve .. many obstacles in the way. I would recommend this alarm. The one thing to avoid is placing the unit so it will see past the movement you want to catch. I had to angle the sensor upwards on the steps so it would only catch movement on the steps, and not in the yard on far side of the steps. The receiver also has many tunes that it can play .. but it has a few basic ones in case you don't want a musical alarm.