I also recommend the Orbit motion sensors
https://www.orbitonline.com/pr...
After some trial and error to get them positioned correctly to guard the entry spots, they have kept the deer out of my garden all season. It takes 6 of them to cover my garden. They are an very sturdy device that doubles as a sprinkler. You can just push a button to run it continuously for 30 minutes as a sprinkler.
