This is the Kung Fu Flash cartridge for the Commodore 64 created by Kim Jorgenson. The PCB is ENIG (gold) plated for long lasting durability. We have used high quality Panasonic buttons. We have excluded the USB port, as we don’t really see a need for that once it has been flashed. If for some reason you want the USB port, message us before making your purchase and we can either install it, or include it with the cartridge. There is a 3D printable case available can find the github project site suggest you read about this cartridge, and become familiar with it's capabilities and limitations before making a purchase. We will carefully package this item for safe shipment.