describe Privacy Level: The opaque window film protects your privacy by blocking other people's eyes. Offers 90% privacy. This window film lets in natural light. Good light transmittance keeps your room private. It's also a clean, modern alternative to drapes or blinds. (Not recommended for bathroom use) ?Rainbow in light?: The window film itself has no color. But if light passes through it, it reflects a rainbow effect, where the colors change as the light changes. It can be applied to any smooth glass. No Adhesive: Can be easily removed without leaving any marks. If it's not damaged or smudged, you can apply and remove it again and again. UV Protection & Energy Saving: Eco-friendly window stickers keep your home cool in summer and warm in winter. Block 96% of ultraviolet rays and delay the aging and fading of furniture. manual : Step 1: Cut the film to the size of the surface to be blackened, leaving a 4mm margin on all sides. Step 2: Remove the back protective film. Step 3: Clean the glass surface to be blackened, and spray water (dont panic if you put too much water, the more the better) Step 4: Apply the smooth side of the film to the glass, don't worry, it's okay if you make a mistake, as the adhesive force of the water spray will allow the film to be removed and reapplied. Step 5: Remove air bubbles by pushing them towards the edge with a ruler or by pricking them with a needle. Recommendations: 1.>The bonding effect may not be optimal in winter. Solution: Soak with a hair dryer or warm water before applying the film to make the film more flexible (heat resistance up to 80C) 2.> Only apply to smooth, dust-free and lint-free surfaces. Chromatic difference: Window film will look different depending on the lighting and background in which the photo was taken. So please accept and understand that there may be color difference between the photo and the actual product. Size: Width 45cmX100CM