1. This product includes a 6-port PCIE adapter card and a 7-port PCIE adapter card, which can be added to the computer through the PCIe slot. Can connect multiple devices at the same time 2. This PCIE expansion card is compatible with PCIE 3.0, PCIE 2.0 and PCIE 1.0 motherboards. supports Windows 7, 8, 10, MacOS and Linux. 3. Easy to install and use, turn off the computer power and find the corresponding PCI-E card slot. Insert the card into an empty PCI Express slot 4. Each interface is equipped with a voltage regulator capacitor. It can provide good temperature control during operation to stable power supply for each interface. Protect your device 5. The product interface is PCI-E 1X, compatible with WINDOWS system, LINUX Colour: black Material: metal+plastic Package Contents: 1 x 6 ports PCI-E adapter card 1 x 7 ports PCI-E adapter card Note: Appearance from batch to batch without affecting functionality Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.