Features: Brand new and high quality. Controller support, plug and play. Effectively solves the lack of PCI-E interface on the motherboard, allowing one interface to be expanded to 4. PCI-E slot power solution, no additional power cable needed. The shape of a complete set of wire rods is customized, never grab the line to plug in. This extension is applicable to the motherboard's PCI-E 1X slot; connect the power cable for the floppy drive. When connecting the PCI-E extension, the computer must break the wires and reconnect. When connecting the wire, you must identify the direction, do not counter or offset, prevent burning equipment. Connect the wire to the equipment's socket first, then connect the wire, avoid breaking the pins in the socket if you press too hard. Supported operating systems: 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) Note: 1. Please allow 0-1 inch error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated the same way; item color displayed in photos may be slightly different from the actual object. Package includes: 1 pc x Pci-e 1 to 4 Riser Card