Description: 4 Slots brings great extendability Plugs directly to the board without any extender cable, can be fixed to the case PCI-E slot power solution, no extra power cable needed Only cable to the slot, easy and convenient to settle and install When plug PCI - E extension must be computer broken wires plug again.The form a complete set of wire rod is customized, never grab line to plug in. Remember that! Specification: Type name:1 to 4 PCI-E USB3.0 Adapter Card Model: ACS-A204 Interface: PCI-E USB3.0 System: Support for WinXP, Win7, Win8, Win10 Material: Metal+Plastic Weight: 0.08kg Size: Approx.120mm x 70mm x 20mm/4.7 x 2.8 x 0.8 inch Package Includes: -port USB3.0 Riser Card for Mining Note: Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!