I was looking to add some extra security around my mothers home, who lives alone. This was perfect for the money. It operates easily, is very loud, and can be put in any room of the home. It does come with a wall mount but I prefer it more mobile. For the price you cannot beat a motion detecter that will alert you of entries. I have better peice of mind. This also comes with 2 remote keys that allow you to activate/deactivate. Worth the money!!
Purchased two of these as added protection mostly for nighttime break in while we are asleep. So far no problems, alarms are easy to set up and are loud which is good for the neighbors to hear also. Also using them now for daytime backup to out current system.