More space for your ideas. Safely and reliably protect and use your Raspberry Pi computer in this case with clear acrylic covers. This case is designed to be attractive, easy to assemble, and perfect for any application. It supports a 40 mm fan that can enhance the performance of the single-board computer. HAT stands for Hardware Attached on Top. Raspberry Pi computers are equipped for everyday use, but sometimes you may want to add an additional hardware controller. Thanks to their GPIO interface, most Pi computers support an additional HAT module, but corresponding cases do not. No problem for the IB-RP106. The included active 40 mm fan, the heatsink set, and the frameless case design effectively dissipate the heat generated by the board, preventing system overheating.