Features: Brand new and high quality. Suitable for motherboard PCI-Express cards, plug and play. A perfect solution for expanding PCI-e support in tight systems or on motherboards with limited PCI-e ports, expanding one interface to four. The plug-in card design connects directly to the motherboard interface without an extension cable and can be connected to the chassis, significantly improving stability and reliability. The main control board uses a PCI-e interface mode for direct power, requiring no external power. Power is unaffected by external interference, ensuring greater stability. Supported Operating Systems: Linux / XP / Windows 7/8 / 8.1 / 10. Specifications: Material: Metal Color: Black Bus Interface: PCI-E X1 (compatible with X4, X8, X16 graphics interfaces) Product Interface: PCI-E X1 Interface x 4 Size: Approx. 65x55 mm/2.56x2.17 inches Note: Please allow 0-1 cm error due to manual measurement. Ensure you don't mind before bidding. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 1pc x PCI Express Card