Features: Effectively solves the problem of insufficient PCI-E connections on the motherboard, one 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, greatly improving 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. By reducing the number of adapters and jumpers, one cable is directly connected to the interface, effectively reducing interface interference and line loss, ensuring data reliability and improving work efficiency. The USB connector is gold-plated to reduce interference between interfaces and improve data integrity. Added BIOS, better compatibility with motherboards and graphics cards, and lower power consumption. Specifications: Material: PCB Number of Interfaces: PCI-E x1, USB 3.0*4 Board Size: Approx. 12x7.5x5.5cm/4.72x2.95x2.16in Supported Operating Systems: for Windows, for Mac, for Linux Bus Interface: PCI-E x1 (for x4, x8, x16 graphics interface) Note: No retail package. Please allow 0-1 cm error due to manual measurement. make sure 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: 1x PCI-E Riser Card