1. All 4 ports are PCI-E X1, not USB. 2. The USB orientation is , reducing the number of adapters and cables. 3. Effectively solve the problem of insufficient PCI-E interface, this product can expand 4 PCI-E. 4. Using 4-layer circuit board: It has very strong anti-interference ability, which effectively ensures the stability, data integrity and impedance matching of PCI-E high-speed signal transmission. 5. The bottom is reinforced to the product from deformation. Specification: Product Name: USB 3.0 PCI-E Riser Interface type: M.2 M Key PCIE Number of interfaces: PCIE X1 x 4 Applicable system: for os /Windows / Linux colour: black Material: metal + plastic Package Contents: 1 x Expansion card 1 x Screwdriver 1 x Screw Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.