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Scarecrow Motion Activated SprinklersWell, this type of sprinkler isn't so much for lawn maintenance as it is an animal repellent. But it's worth a mention anyway because of its great design. The Scarecrow motion activated lawn sprinkler blasts a stream of water at any unwanted bird, deer, raccoon, or animal that crosses its path. It works by sensing movement and heat, much the same way as a security light. When it detects an animal, a valve opens, instantly releasing a three-second pulsating spray of water. The combination of the sudden noise, movement, and water frightens animals away. This startling, yet harmless action is a remarkably effective deterrent. The Scarecrow requires a 9-volt battery, which easily lasts through an average summer's use, and a hookup to a garden hose. The Scarecrow covers up to 1000 square feet. The sensor detection zone is 35 feet deep and 45 feet wide 100 degree Good for keeping creatures away from ponds and gardens.
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