Blackout honeycomb blinds can block 100% light.room darkening and protect you, your family and home furniture from UV rays. Colorful cellular shades darken the room, provide full privacy 1. Put the tension mechanism of one end to clip it into the window opening 2. Press the tension mechanism on the other end to make the whole top track inside of the window opening and adjust to proper position 3. Tighten and lock the nut of tension mechanism on both ends with the provided wrench to fix the top track 4. Sliding the cover to the tension mechanism, finish the installation Blackout & Light Filtering -2 Fabric Types Are Available