Lightailing LED light, means to light up the darkness, a fantastic item to light up your 21336 The Office building blocks model. It can make your building blocks become more beautiful and unique and it gives them new vitality. Our products, using environment-friendly material, are all packed in a new charming original box. Quality is guaranteed and all is handmade so you can buy this item without worry. Package includes: 1 USB light kits, model set not included, universal and special version instructions guide, battery box. By the way, all of the building blocks set featured in the images and video are just for the lighting show. Fit with any brand building blocks model and it is easy to install. LEGO is a trademark of the LEGO Group, which does not sponsor, authorize or endorse this product. We are dedicated to provide the best after-sale service and premium product for Lego fans around the world. Meanwhile, we provide a worry-free 2 year warranty after-sales service for our light kit, your satisfaction is a great motivation for us. For more information about our product, Please contact us at any time!