【Why Choosing "BERISSA" Cellular Shades】①Professional shades production process, Upgraded generation of honeycomb shades products, to give you the best-looking cellular shades appearance./ ② We offers 12 months guarantee, if you have problems in using our cordless cellular shades, please contact us via Amazom mail, we will solve your problem. 【Cordless Safety Design】Cordless Blackout cellular shades feature an upgraded cordless operation for a clean look and children&oet safety. Its cordless feature is used friendly and provides peace of mind for all. Gently push up or pull down, you can pull the honeycomb shades to any position you want. 【Exellent Functionality】Made of non-woven fabric with built-in aluminum foil inside. Making our window shades block light and harmful ultraviolet rays, provide ideal Thermal Insulated and 100% blackout, saving your money all year on energy bills. Stay cooler in the summer and warmer in the winter. You will be surprised at how great our honeycomb blinds help control your desired room temperature.【Other Function】Wrinkle Resistant/Noise reduction 【Rail Color-Matched】The top and bottom rails matches the fabric color, finely painted and excellent frosted texture on the surface, this color-matched cellular shades form a color integration from the front view, give you the most beautiful visions of cellular blinds. 【INSIDE & OUTSIDE MOUNT】Inside Mounting cell blinds for windows require a minimum 2" window frame depth, shades width need to be 1/4" less than window width, shades length need to be 2 inches longer than window length. Outside Mounting cellular shades, cellular blinds need to be 4 inches wider and longer than window width and length for better coverage. cellular shades