This little unit works great! Easy to set up and install.

The instructions with the unit are inadequate. There are three volume levels: very loud, ear piercing, completely intolerable. They claim to have three dozen different chimes but they do not tell you how to change the setting.

Bought this and 2 extra motion sensors to add to the swann driveway alert I already had. Now whether I am in the house or my shop I know if anyone is coming up the driveway or at my home. Works flawlessly!