1. This kit consists of a control board and three light boards, the colors are red, blue, white 2. The circuit consists of a NE555 circuit, a CD4017 circuit and a LED light circuit 3. Master the principle of this kit, you can make running billboards or decorative ambient lighting 4. After power on, the red and blue light panels have each flashed twice, and then the white light panels flashing once, so alternating cycles 5. Easy to install and use: simple design, suitable for DIY enthusiasts, with clear instructions and simple installation process Model: TJ-56-715 Supply Voltage: DC 12V Control board: 60.7 x 37mm LED light board: 35 x 26mm (Different batches may have different printed characters, but it does not affect the use) Color: As shown Material: Plastic+Metal Package Contents: 1 * Light Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.