1、Tailored for Raspberry Pi 4B. For Raspberry Pi 4B and 3B+/3B have different interfaces, and the shells are not universal. 2、Passive heat dissipation of the whole shell. The heat of the for Raspberry Pi CPU is transferred to the aluminum alloy shell through the heat conduction column, and the dual fans further enhance the heat dissipation effect of the aluminum alloy itself. 3、Aluminum alloy shell, metal heat sink, the whole is hard and beautiful, lightweight and durable, and the metal stripe design allows the temperature to be more effective in a shorter time. 4、The tail of this aluminum alloy shell is slotted, which does not affect the wifi/for Bluetooth signal transmission. 5、This shell is designed with GPIO position opening, camera connection port, Poe interface hole, digital‑speech interpolation display connector interface hole, which is convenient for GPIO pins to plug and unplug without opening the cover. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store