Product name: PCI-E 1 to 4 riser card Product model: PCE4PCE-A01 Bus interface: PC|-EX1 (compatible with X4, X8, X16/graphics interface) Number of interfaces: PCIE USB interfacex4 Product interface: PCI-E 1X Support system: compatible with , LINUX Colour:black Material: PCB Size:120 x 55 x 75m Package Contents: 2 x Adapter card adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Easy to install: a flat cable, easy to install and install, improve your work efficiency. Processing technology: Gold-plated USB ports can reduce interference between interfaces and improve data integrity. Strong compatibility: Improve the BIOS, improve the compatibility of the motherboard and graphics card, and reduce power consumption. Easy to install: It can be directly connected to the board without an extension cord, and can be connected to the chassis, which greatly improves the stability and reliability. Indicator lights-add all six LEDs. The LED lights flash on , which is very comfortable .