After being powered on, 43 LEDs dynamically display various patterns, and 9 animation playback switches are achieved through the screen switching switch S3, including forward windmill, reverse windmill, rotating petal, rotating pendulum, rotating sheep horn, petal blooming, snowflake formation, concentric diffusion, and rotating ellipse. Press S1 to slow down and S2 to accelerate. The products which are suitable for electronic enthusiasts to study and repair circuits. The installation of the circuit requires the buyer to have experience in the circuit. Note: This is DIY kit, not a finished product. You will need to solder it yourself. All light-emitting diodes and microcontrollers have polarity components. Be careful not to install them upside down. If other colors are needed, simply replace the LEDs (note: all LEDs on the circuit board are installed in the up positive and down negative directions). Introduction to Circuit Principles 43 LEDs are connected to a dedicated microcontroller DX158 through a combination of rows and columns, and are scanned and driven to light up as needed through the microcontroller program. The microcontroller program of this kit has been burned and can produce results after welding. DC1 is small DC socket, It can be powered by 4-5V DC, and can be powered by any 5V charging head. ( 5V charging head Not included). C1 is a filtering capacitor, which is generally not installed for stable power supply, and the kit is not provided, which does not affect the usage effect. Color: Green Material: PCB Package Contents: 1* DIY kit 1* Power cable 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.