for Mister-USB Hub Board: This is an optional add-on USB Hub for convenient USB device connections. With this board the for MiSTer has an extra USB ports that fit snugly under the existing chassis. The USB Bridge seamlessly connects to the DE10-Nano SoC board without any additional wires. Upstream -USB port 5V DC connection. Based on FE2.1 chip for MiSTer IO Board: The for MiSTer IO Board is an optional expansion that plugs on top of the for Terasic DE10-Nano SoC. It adds the following features to the for MiSTer Platform: VGA Connector. Check Analog video output compatibility 3.5mm Audio with TOSLink 3 Buttons 3 Status Secondary SD card (for some cores) FAN for cooling the FPGA Expansion connector (in the form of USB 3.0 connector, it's not USB!) Additional to integrate the for MiSTer into cases. The appearance and color of products from different batches , which does not affect their use Colour:blue Material:PCB Package Contents: 1 x Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.