brand new and high quality Features: Effectively solve the problem that the motherboard PCI-E interface is not enough, an interface can be extended out of 4 Plug-in board design, directly connected to the motherboard interface without extension cable, and can be fixed to the chassis, greatly improving the stability and reliability The main control board adopts the PCI-E interface direct power supply mode, no external power line is needed, so that the main control power is not affected by external interference, and the stability is higher. Reducing the number of adapters and patch cords, one wire directly to the interface, effectively reduce interface interference and wire loss, ensure data reliability, and improve work efficiency Added BIOS, enhanced compatibility with motherboards and graphics cards, reduced power consumption. Specification: Material: P CB + Metal Colour: Black Size: Approx.58 x 78mm Support System: for all for WINDOWS systems, LINUX for M AC Bus Interface: PCI-E X1 (for X4 X8 X16/graphics card interface) Number of interfaces: PCI-E USB interface x 4 Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-3mm 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! Package Includes: 1 x PCI-E 1 to 4 Riser Card