Features: What you receive is only lighting, and the model is not included! This lighting kit is especially suitable for 21357. The model kit needs to be purchased separately or own by yourself. Specially by our lighting experts, we also provide step-by-step online instructions. After installation, almost no exposed lines, which fit your suit perfectly. Adopt advanced ABS to ensure its safety and durability. The recommended is 3~5V. Do not worry, our lamp kit not damage your model. Light up your model freely with compatible light through any USB port device. Creative light provide energy and life for your lamp, making them from dark to bright, and enhancing their hands-on ability and thinking ability. Lighting will turn the display into something more interesting. Very suitable for office or home decoration and display. Specifications: Component:Plastic Type:B/A Size:As shown in the picture Package Includes: 1 Set Building blocks Lamp (excluding building blocks) note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.