Features: 4 slots brings excellent extensibility. Plugs directly to the board without any extender cable, can be fixed to the for case. PCI-e slot power solution, no for extra power cord needed. Only one cable for the slot, easy and convenient to install and install. With big radiator, better heat dissipation effect Specifications: Color: black Material: metal + plastic Bus port: pci-e 1x 1x pcie speed: 5gbps Port quantity: 4x USB3.0 Main Chip: ASM1184e Supported operating system: for dos, for linux, for windows xp/7/8/10 Note: This extension is applicable to PCI-E 1x mainboard slot, please connect the power cable to floppy disk. When pci-e extension plug should be computer broken wires plug again. The form a complete set of wire rod is customized, never grab the line to bind. Remember this When the plug wire must identify the direction, not to counteract or compensate, prevent burning of the equipment, plug wire when the equipment socket first, then the plug wire, avoid the very hard pin of the socket socket is broke. Package includes: 1PC x 4-Port USB3.0 Riser Card