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 need to solder it yourself. This circuit is driven by a DX158 microcontroller, and there are multiple lighting control modes in the circuit. After starting up, it plays in a loop. Pressing the button can cycle to change the flashing speed. In most cases, the speed is increased by one gear per press, and when it reaches the fastest speed, pressing the button return to the slowest gear, and so on. Installation precautions: All light-emitting diodes and microcontrollers have polarity components. Be careful not to install them upside down. If you need other colors or colorful effects, just replace the LED., Weight: 0.12015193279 Pounds, Manufacturer: Aboiled