Features: 1¡¢EXPANSION BOARD: The for MiSTer FPGA Digital IO Board v1.2 is an optional extension that plugs into the for Terasic DE10 Nano SoC. 2¡¢OPTIONAL: For MiSTer IO Digital Board v1.2 includes a jumper for selecting 3.3v or IO on the user IO port. 3¡¢WIDELY COMPATIBLE: Select IO to support the for Sega Mega Drive , for Genesis , forMaster System gamepad using the SNAC adapter board. 4¡¢DIFFERENT FUNCTION: 3 buttons different buttons with different functions, 3 status indicators. Auxiliary memory card (for some cores). 5¡¢CAUTIONS: Digital IO module has an expansion port (in the form of a USB 3.0 port, but not USB ). With 3.5 mm jack for TOSLink. 6¡¢EASY INSTALLATION: The digital IO module has a fan for cooling the FPGA and comes with 1 screw pocket. Easy to install. Package included: 1 x Digital IO Board 1 x Fan&nbsp 4 x Screws&nbsp 4 x Nuts&nbsp