Features: brand new and high quality Suitable for motherboard pci-express card, plug and for play. A perfect solution for expanding PCI-e support in tight systems or on motherboards with limited or minimal PCI-e ports,an interface can be expanded to 4. The plug-in card design can be connected directly to the motherboard interface without an extension cable, and it can be connected to the chassis, which significantly improves stability and reliability. The main control board adopts pci-e interface direct power supply mode, and does not require an external power cable. The main control power supply is unaffected 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 graphical interface) Product interface: PCI-E X1 interface x 4 Size: approx. 65x55mm/2.56x2.17in Package Includes: 1PC x PCI for Express Card note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!