Features: The product is crafted of PCB materials, with long service life and guaranteed quality. This circuit is especially suitable for hobbyists, beginner to use. It is highly interesting, have obvious effects, and have low production difficulty. It is a material for assembly practice, skill training, etc. This kit configures 10 LEDs into a circle and starts working when button is pressed. It is simple and convenient to use. The power supply method is 2xAA batteries. The product is shipped without batteries. You need to bring your own. Crafted of a combination of NE555 and CD4017 chip, with stable performances. Specifications: Component:PCB Size:Approx.70x70x21.6mm/2.76x2.76x0.85inch The product is shipped in independent packaging and in parts and needs to be assembled by yourself. Package Includes: 1 Set Electronic Lucky Spin Wheel Kit note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.