eSource Optics Holiday Wreath Rainbowindow can be attached to any window that receives direct sunlight. Rainbow bursts are projected onto walls, ceilings and floors creating one of the most relaxing effects. Each eSource Optics Holiday Wreath Rainbowindow comes with a vinyl rubber suction cup attached for easy hanging. Approximately 10 1/2" X 7 3/4" Heavy plastic coated paper board with Holographic Lens. Give the gift of a rainbow this Holiday Season!