EASY INSTALL BLINDS: The remote blinds have a simple and practical no-drill mechanism(suitable for inside mount). Attach the adhesive extension block to the groove of the upper rail (it is forbidden to put more than one block), and then push it into the window frame. There is a battery compartment at the top to supply power for the shades. If the batteries are low, just take them out and replace, you can refer to the manual to replace the battery compartment. EXCELLENT SHADING EFFECT: The fabric is made of a three-layer blackout textured fabric, which is safe and durable. It is a great combination of UV and privacy protection, suitable for bedrooms, living rooms, kitchens and office areas, etc.