Features: Double-channel PCIe FFC design supports simultaneous connection of multiple PCIe HAT expansion module, achieving data transmission rate up to 16Gbps. Supports multiple PCIe HAT module stack, and can be installed without additional tools. This convenience enables users to easily upgraded equipment functions, which is suitable for professional developers and improves the efficiency of DIY projects. The expansion board is suitable for mainstream single-board computers and accessories, ensuring wide applicability. This compatibility solves the problem of users when choosing hardware, and is especially suitable for educational institutions, maker space and individual developers. Overvoltage protective mechanism can effectively prevent equipment damage caused by unstable power supply. Specifications: Size:Approx.65mm/2.56inch Package Includes: 1Pc Expandable Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.