The led light can make the building blocks toys shine in an instant, and it means that it gives them brightness in the dark. Previous page Next page 1 GET RID OF DULLNES 2 FOCUS ON DETAILS Lightailing brings shine to your brick world Tips: After receiving the package, please test whether the product works normally. The power supply voltage should be lower than 5V to avoid burning out. Previous page This is an exciting play experience. It is the existence of led light that gives building blocks new life and brings them new vitality. Please note: only light kit. The LEGO model 40499 Santa's Sleigh is not included. Next page 1 GOOD GIFT CHOICE 2 WARM REMINDER Are LEGO models included? No.This is only the led light set. How to supply power? Although it allows batteries for power, the USB connection cable makes it more convenient to supply power.(power supply should be less than 5v to avoid burning.) How to install it? You can check the product manual inside the package, which records the step-by-step installation steps in detail. At the same time, you can also view the installation video on the web page.