This situation is suitable for the Raspberry Pi 4B board, and its interface is different from the 3B+ / 3B board. It is made of ABS plastic material with a matte texture and fine workmanship. It adopts a snap-on design for the top and bottom covers, and all the holes around it correspond to the Raspberry Pi 4B board individually, which protects the Raspberry Pi 4B without affecting the user's usage. In addition, there are two types of cooling fans available. The black large cooling fan provides strong wind and more efficient cooling in a shorter time, while the LED cooling fan comes with built-in LED lights, making it both aesthetically pleasing and a cooling solution in one.