1.You can customize it according to your vehicle.The size of the led door sill light can be: length: 23.22 inches, width: 1.99 inches, thickness: 0.2 inches (front door) /// length: 9.84 inches, width, thickness: 1.99 feet (rear door) We provide high quality customization service. Just provide the icon or text that you want to get your own led threshold pro. (Tip: Please check the size of your car door sill before placing an order. As long as the size is enough and the thickness can be put down, all models can be customized) 2.When the car led door sill light lacks power, it will flash one after another. When charging, it will turn red and when fully charged, it will turn green. Charging time is usually 3 to 4 hours. Charging needs to be disassembled to charge 3.There is an installation video in the main picture to watch, an installation manual in the product package, and our after-sales e-mail, you can contact us to solve all kinds of problems.