Device card is used to transfer between PCI-E and PCI-E.Easy installation, fully plug and play, convenient and efficient. Customized for mining BTC. Support 4 port high speed PCIe 1X card. Solid capacitor provide extra stable power supply for PCI-e card The PCI-E 1X slots that are separated are all in gen2 mode, even if they were in gen1 before. This is a very nice feature. This PCI-E adapter card can convert 1 PCI-E X1 card slot of the computer motherboard into 4 PCI-E X16 card slots at the same time. 4 PCI-E X16 card slots can be connected to sound cards, graphics cards, network cards, etc. at the same time , Can work independently without interfering with each other. This product does not need to install the driver, it can be used by inserting it into the computer card slot Package Includes: 1 x PCI-E Card 1 x PCI-E Slot Board 1 x USB3.0 Cable 1 x Power Cable Specifications: Product name: PCI-E 1 to 4 Riser Card Product interface: PCI-E 1X Size: Mixed Support system: compatible with all Windows systems, Linux and more. note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.