Contech Electronics CRO101 Scarecrow Motion-Activated Sprinkler for $41.74 shipped. Here is a screenshot for your reference. This scarecrow motion-activated sprinkler is meant for humane animal deterrence, detects and sprays animals in a 1,000 square foot area day and night. The set includes a sprinkler, mount, and motion detector. As a comparison, The Home Depot currently has this scarecrow sprinkler for about $89.