Features: Small PCIE to double Expansion Card with ASM1083 Controller enable integration of device, supporting double slot expansion for enhanced hardware compatibility and stable data transmission. Designed with USB connection to prevent circuit damage, this adapter requires step by step installation via small pcie slot and included USB cable, featuring automatic driver recognition for plug and play functionality. Ideal for IT professional, PC builders, and retro computing enthusiasts needing to connection cards like sound cards to newer motherboards lacking slots. Perfect for upgrading office workstations, maintaining industrial control, or restoring vintage gaming PC by adding multiple based peripherals through a single small pcie slot. Using ASM1083 main control chip, it supports double expansion and is suitable for various operating systems. Specifications: Component:Plastic Size:Approx.13.4cm/5.28inch Package Includes: 1 Set Development 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.