Features: Easy to assemble with obvious effects and high interest. The circuit can be used for electronic toys, art lighting, and LED signs. This kit uses an NE555 and CD4017 simulation light circuit, where blue and red LEDs flash alternately with the pulse. It's a fascinating circuit that simulates the visual effects of warning lights. This kit is easy to assemble, suitable for electronics enthusiasts and students for practice. Specifically designed for practice, it's cost-effective. Red and blue diodes can be connected via wires to expand the lamp distance. The original circuit board number and model are printed on the board; the right seat can be installed. Package includes: 1 set of electronic flashing light kit Specifications: Material: Plastic Note: Please allow for a 1-3 cm error due to manual measurement. Ensure you don't mind before purchasing. Due to differences in monitor calibration, the image may not reflect the actual color of the item.