Police recommended to deter intrusion. I've had a regular march of neighbors coming into my driveway and there's even been a theft in my garage. I asked her on the recommendation of the police. I actually have 2. One at the entrance to the driveway and one at the entrance to the area in front of my garage. They work. Haven't seen anything other than regular deliveries in 12 months. I think the neighbors are afraid to make videos! FYI, the red flashing light lasts a LONG time. 12 months and still working for me.