Cooling box for Raspberry Pi4

Description : The main material of this case is aluminum alloy. The upper case is hollow, covering all other parts of the board Raspberry Pi, except the network cable interface and USB interface, GPIO connector, camera, Poe, DSI screen and other interfaces are reserved for user wiring. The bottom case covers the back of the entire board Raspberry Pi. The back of the case has slots to prevent the transmission of Wi-Fi / Bluetooth signals from other devices. Its biggest difference is that it has two fans and a built-in thermal column, combined with thermo-conductive silicone, can transfer heat from the Raspberry Pi card to the aluminum alloy case, which is distributed on the aluminum alloy case.