Easily adjusted, can be detached for cleaning at any time, and allow sunlight to stream into the room 100%blackout, with the aluminum foil and honeycomb structure offering excellent light blocking, noise reduction, and thermal insulation. No drilling is required for installation, thus without causing any damage to the walls. It can be custom-cut to fit the actual dimensions of your window, and can even accommodate irregularly shaped elliptical windows. HOMEDEMO,creates stylish and environmentally friendly designs that incorporate sunlight and nature, enabling you to enjoy nature to the fullest.