It is made of ABS and acrylic material, and it attached a 4010 fan with it.
The 4010 Fan has blue backlight and it can be attached to 5V or 3V3 on Raspberry Pi 4B’s GPIO to adjust the speed of the fan. The whole case is fixed by flat screws and nuts.
The back of the case has two mounting holes and the holes for GPIO interfaces and CSI and DSI interfaces has been reserved, it come with 4-piece aluminum heat sinks for the heat dissipation.