Night time predators are very determined to get at your birdfeeders, birdhouses, gardens and home. State-of-the-art, solar-powered, weatherproof unit is guaranteed to keep out all night time predators.-Maintenance-free, solar-powered units require neither batteries nor electricity.-Red flashing LED light automatically turns on at dusk and off at full daylight.-Concept is simple, but it WORKS! Predators believe the flash to be the eye of another organism and feel threatened, so they stay away.-Multiple unit locations are most effective.