[No Drilling No Tools Installation]: Enjoy a quick setup in just 25 seconds without tools or drilling. The design allows for easy removal and repositioning without causing any damage to your walls. [Safe Free-Stop System]: The cordless design is safer for children and pets. They feature a robust spring-loaded mechanism that has passed 5,000 times of lifting and pulling tests for each blind. You can smoothly stop the shade at any position. [Privacy Protection]: Made of 100% polyester material with reinforced thermal insulation coating, these fabrics feel soft and smooth. They are free from burrs, and resistant to wear. Our blackout roller shades can enhance the privacy of your office, living room and bedroom. [UV Protection and Thermal Insulation]: Premium blackout blinds made from luxuriously soft, durable polyester with a thermal coating. Blocks all sunlight/UV, minimizes heat transfer, saves energy. [How to Order the Right Size]: Measure the insidesurface horizontally in 3 different place ,top,middle and bottom. Please choose the narrowest window width for order width. The chosen size length need to be more than or equal to the length of the window. Pls note: this blinds is only for inside mount,can't be used for outside mount