Package Includes: 1*Multi-function cooling expansion board 1*Raspberry Pi cooling fan 1*gpio pi header 1*2*20pin header/female header 1*resistance 1*diode 1*transistor 4*Nylon rivet M3 4*screw 4*Copper pillar Note: This kit does not include the Raspberry Pi board, we will provide a program code after purchase

Specially designed for Raspberry Pi, it is perfectly compatible with Raspberry Pi 4 and 4B. On-board large-size cooling fan, good heat dissipation ，strong wind power make the Raspberry Pi run more stable and no worrying about overheating and noise problems. No wiring, you can also extend the Raspberry Pi 40pin connector,you can connector, you can connect other devices. Easy to install, the pin identification is clear, and the GPIO function is fully displayed. Using the principle of PWM pulse signal to realize signal output. When the temperature reaches 40°, the cooling fan will automatically rotate to protect the Raspberry Pi and extend its life. This is a multifunctional heat dissipation expansion board specially developed for Raspberry Pi, which is light and easy to install. The fan has very low noise and it only runs when you need it.