Perfect so far, I have placed it on the back balcony of the bedroom to have some notification in case someone approaches as a potential burglar mainly at night. The sound is very loud, 110db, and the most important thing is that it detects motion at night without any illumination. It takes 4 AA batteries. I have placed it in a spot where it doesn't get rain or sun, and I hope it will withstand the test of time. If needed, I will come back.

After a while of use, it works well. It's worth mentioning that every time the batteries need to be changed, it goes off for no reason.