This 3D window film is in technique. The product itself is transparent, it will appear the Rainbow effect under the sun or light. That is to say that this film is initially colorless but it becomes colored under the light. Transparent Support: Attention!!! Clear Film behind window film must be removed prior to installation; Privacy Protection: Provides privacy and allows lights to enter. Privacy level: 3 stars. Movies for semi-private windows (Protects your privacy, but not recommended for bathrooms) Easy Removal: Leaves no residue after removal and the film can even be used again! Energy Saving: Retain Heat in Winter and Keep it Out in Summer; Insulation: reduce heat transmission and block 96% of UV rays Unlimited Patterns: Create the look of stained glass with many pattern options at Privacy Protection: It's nice to feel safe in your home Glue-Free: Just use water to install, no sticky glue required Unique Pattern: Decorate your home windows with stylish patterns Removable and Reusable: Premium PVC material provides extra durability, can be removed and reused over and over Anti-UV: Say goodbye to UVA rays and UVB rays which can hurt your skin and cause furniture to fade 1. Measure the area and cut the film. Leave an extra one inch allowance on each side for easy adjustment. 2. Thoroughly clean the surface of the target and ensure that the surface is sufficiently clean without dust. 3. Peel off the transparent protective film along a short side. (Very Important!) 4. Spray plenty of water on both the SMOOTH side of the film and the window, then install the window film on the window. 5. Use the soft towel or squeegee to wipe the film back and forth to make sure bubbles and water have been totally removed. 6. Trim the margins and use a cloth to flatten the film. Step 1 - Please wet one corner of the window film and use your fingers to twist it for a while to loosen the attachment between the window film and the clear backing film;Size: 45200cm Step 2 - Please attach a small tape on the corner side of the transparent backing film (we also attached a small tape on each window film roll for your convenience), then press it for effective fixing; Step 3 - And then you are able to easily separate the clear backing film from the window film. You can use and remove the film again and again. Absolutely no residue after removal. Ideal for apartment rental This privacy film can diffuse direct sunlight to prevent glare, allowing you to work and study under mild sunshine Use the window film in your living room, kitchen, office, etc. Your windows will look better