Features: brand new and high quality Controller support, plug and for play. Effectively solve the lack of PCI-E interface on the motherboard, and one interface can be expanded to 4. PCI-E slot power solution, no for extra power cable needed. The form a complete set of wire rod is customized, never grab line to plug in. This extension is applicable to the mainboard PCI - E 1X slot, Please plug in the power cord for the floppy. When plug PCI - E extension must be computer broken wires plug again. When plug wire must identify the direction, not to counter or offset, prevent burning equipment, plug wire when the socket of equipment first, then plug wire, avoid too hard plug socket pin is broken. Supported OS: DOS, Linux, for Windows XP/7/8/10 . Specifications: Material: Metal Color: Black Interface: 4 x USB Bus interface: pci-e x1 (for x4, x8, x16) Package Includes: 1PC x Pci-e 1 to 4 Riser Card note: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from actual item.