Can't sleep during the day? Feeling too bright of your south facing window? Feeling being spied on? Feeling boring for a blank transparent window? You've come to the right place. KESPEN will fulfill all your needs Feature: 1.100% light blocking, turning your day into night, is super suitable for night shift workers or light-sensitive people. Static cling design, easy to install and removable with no residue. Two-way privacy, effectively block unwanted views from the outside. Heat control and UV blocking. Installation Instructions: Step 1: Measure the width and the height of the target area, cut the film and leave extra 2-3 cm on each side for easier adjustment. Step 2: Clean the target surface of the window, make sure no stain is left. Step 3: Peel off the transparent film, spray A LOT OF water onto both the window surface and the back side of the static film. Step 4: Paste wet side of the film onto the wet glass, smooth the film with hands. Step 5: Use the squeegee to remove extra water and bubbles from the center to the around with proper strength. Step 6: Trim off the margins and wipe out surface water with a lint free towel. Useful Tips: Before pasting, remember to tear off the protective film and spray a lot of water. Use a watering can to spray more water on the glass and surface of the film., the more water, the better, and scrape all the bubbles out with a squeegee. Cut the film to a size of 2mm from the window frame, pick up a corner at the edge, re-spray and paste, and scrape the bubble. Package Included: One roll of window film 1 x user manual