Not only does the led light give you visual appreciation, but it makes you feel the beauty of led light for your 42127 Technic Batmobile. It is the existence of led light that gives building blocks new life and brings them new vitality. Please note that this set is a light kit only. The LEGO model (42127 Technic Batmobile) is not included. What's included: 1. 1 LED light kit 2. 1 Battery box (batteries not included) 3. 1 Paper instructions All packed in a new original box. Give Your Bricks New Vitality Tips: Prepare the power bank, battery box, or USB Hub in advance. When you light up your 42127 Technic Batmobile, you should test the product to see if it works properly, and the power supply should be less than 5v to avoid burning. The product is compatible with any major brand bricks, and it is easy to install, but you have to be careful when you do this. Easy to Install The easy-to-follow instructions will guide you through assembling the lights step by step, offering great assistance for installation. USB Power Supply Although it allows batteries for power, the USB connection cable makes it more convenient to supply power. Quality Handmade Material LED light kits are handmade and no harm material, with no burrs and odor and no safety hazards.