Features: Brand new and high quality Suitable for motherboard PCI-Express card, plug and play. A perfect solution to expand PCI-e support in tight systems or on motherboards with limited or minimal PCI-e ports, one interface can be expanded to 4. The plug-in card design can be directly connected to the motherboard interface without an extension cable, and it can be connected to the chassis, greatly improving the stability and reliability. The main control board uses the PCI-e interface direct power supply mode and does not require an external power cable. The main control power supply is not affected by external interference and has greater stability. Supported Operating Systems: Linux / XP / for Windows 7/8 / 8.1 / 10. Specifications: Material: Metal Color: Black Bus Interface: PCI-E X1 (for X4, X8, X16 graphics interface) Product Interface: PCI-E X1 interface x 4 Size: approx. 65x55mm/2.56x2.17in Note: Please allow 0-1cm error due to manual measurement. Make sure you don't mind before you bid. 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 for Express Card