Skylight blinds are attached directly to the glass with suction cups. No drilling required. It can be placed at the top, bottom, or in the middle at any height from the window to create optimal sun and privacy protection according to your needs. WIDELY USED: Sun protection for windows, balcony doors, sloping roofs or patio roofs, bedrooms, children's rooms, office rooms, hotel rooms, home cinemas or RVs. It reliably darkens rooms even in daylight. It can be attached to any window, and the attachment can be easily removed without leaving any traces. Package includes: 1 x roller blind; 3 x suction cups; 3 x double-sided extra pads [Instructions for use]: 1. Clean your window glass to ensure that the suction cup can be stably adsorbed on the window. 2. Press a suction cup with an alloy rod on one end of the window glass to fix the heat insulation curtain on one side of the window. 3. The other suction cup is adsorbed on one end of the window. When in use, the plastic ring is pulled out and fastened to the suction cup at one end. 4. When you do not want to use the heat insulation curtain, just gently pull the small round particles on the top of the suction cup to make the suction cup separate from the glass, and the heat insulation curtain will automatically roll up. Tips for installing suction cups: High temperature in summer or long-term adsorption, placement, extrusion. If the suction cup is deformed or shows signs of falling off, apply a little water around the suction cup to strengthen the adsorption rate. If the suction cup is deformed due to packaging, you can put it in water and iron it to restore the prototype.