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. A stylish valance is included to block the light from the gap between fabric and the top rail