The lower portion of the Nikao F-1 features a drop down door that hides two USB ports, microphone and headphone jacks. The ports are connected via a series of extender cables, which reside inside the case and must be connected to the appropriate motherboard headers prior to use. Consumers will need to refer to their motherboard manual for proper pin placement of these cables. The window is held in place by a series of screws attached to the left side case panel.