it is a 5 zone alarm so all windows and doors in that pic are allarmed. I used normaly closed switches (when the door/window/garage is shut) so if the wires are cut, the alarm will go off.. this could actually be installed in a house, it would just need longer wires and the key switch would need to be external (in the porch or somewhere outside) otherwise the alarm would go off every time you opened the door.... not perfect but its a start!!! lol