With the special 3D laser design, it only shows colorful rain color effect when sunlight hits the film after installation when the light changes from outside. Provides protection for privacy while allowing light to pass through.Privacy Rating: 3 stars.Privacy changes with light. Glue-free, eco-friendly materials the environment, avoiding the release of chemical substances. It keeps heat inside in winter and cool in summer, reducing heat transfer and blocking 99% of UVB rays, protecting your skin against exposure to harmful radiation. No residue after peeling off.This 3D window film can be reused as often as you like, you can attach and remove it again and againSteps of the attachment: 1. Thoroughly clean the glass and window frame, especially the four sides and corners of the glass where dust easily accumulates 2. Measure the surface of the window to be bonded exactly and cut the film 2-3 cm longer than the window to be bonded, so that the edges of the film can be easily cut after fixing. 3. Tear off the backing film (tip: attach two pieces of adhesive tape to the front and back on one corner of the film, then separate the adhesive tape and the backing film is removed) 4. Spray the glass with soapy water 5. Attach the sheet to the glass, it is best to start from the top 6. Squeeze out water and air bubbles with a squeegee (it is best to wrap the squeegee in a towel to avoid possible scratches) 7. Trim the excess foil around the edges 8. Towel dry the film and window frame Fully reusable, fantastic choice The sheet can be attached and removed again and again.Absolutely no residue after peeling off .Ideal for rental apartment Enjoy more comfortable light This privacy film can diffuse direct sunlight to prevent glare, allowing you to work and to study under soft sunshine. Decorate any place Use the window film in your living room, kitchen, office, etc.