Each decal contains a component which brilliantly reflects ultraviolet sunlight. This ultraviolet light is invisible to humans, but glows like a stoplight for birds.

The decals are approximately 4” across and should be placed a minimum of one every 3x3 feet of glass, on outside of window.

To the human eye, the decal appears as frosted or etched glass.

The decals are packaged FOUR DECALS per ENVELOPE.