Features: Expansion function: This expansion board is designed specifically for IO-BASE-MINI mini mainboard, providing additional expansion interfaces and functions, allowing users to more flexibly connect and use other devices and modules. Strong compatibility: The product is fully compatible the IO-BASE-MINI mini mainboard, ensuring seamless use and simplifying the assembly and configuration process for users. Multiple interfaces: The expansion board provides various commonly used interfaces, such as USB, HDMIcompatible, Ethernet, etc., making it convenient for users to connect external devices, displays, networkings, etc. Compact design: The product adopts a compact design, perfectly combined with the IO-BASE-MINI mini base plate, without adding too much volume and weight. Good quality materials: The expansion board is from good quality materials, which have excellent durability and stability, and can operate stably for a long time. Specifications: Material:PCB+metal Size: Mixed Type: IO-BASE-MINI Expansion Board Package Includes: 1PC IO-BASE-MINI Expansion Board note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurm