WindowAlert UV Decals

WindowAlert decals help prevent wild birds from accidentally striking windows. Each decal has a special coating that reflects ultraviolet sunlight. This ultraviolet light is invisible to humans, but birds see it as a brilliant glow much like a stoplight. Place decals on the outside of the window.  For optimal protection, scientific studies suggest placing decals 4 inches horizontal, by 2 inches vertical, from one another. UV coating will fade based on exposure and local elevation. For best results, replace decals every 4 months or test with the WindowAlert UV Flashlight. CONTENTS: Decal count varies by design. TYPE: Static cling. Made in the USA. (If a single bird repeatedly attacks your windows, please use our Stop Bird Attack spray). Now available in economical 4 and 12 packs, complete starter packs for beginners, or mix and match with our singlen envelopes.