Mini pci-e to dual USB expansion card, which can be expanded into two USB2.0 female ports through the idle mini pcie slot,suitable for motherboards or notebooks with MINI PCIE interface. Dual USB2.0 interface is 5V1A, suitable for connecting mini USB devices, such as USB wireless mouse receiver, USB Bluetooth adapter,USB WiFi network card adapter,USB flash memory,USB card reader(micro SD/M2),online banking USB shield,etc. The working principle of mini pcie adapter card: It is marked that MINI PCIE contains USB signal and 3.3V power supply.This product leads the USB signal to the USB socket,and boosts the 3.3V to 5V/1A voltage to supply the USB device Because the USB signal is output from the computer, some computers shield this signal,or there is no signal output at all,which will cause the card to be unusable. It is not a problem with the card.You can search the whitelist tutorial online to unlock the USB port (Note:This operation is only suitable for For users who have computer knowledge,other users should not try,it will cause the computer to blue screen and fail to boot,please pay attention!!!) Please note before buying: 1:Confirm whether the slot on the motherboard is MINI pcie.The appearance of MSATA and MINI PCIE slots are the same.This product is directly suitable for MINI PCIE interface applications.Other interfaces are not available 2:Need to confirm whether the mini pcie interface on the motherboard is defined by USB 3.The screws provided are common size screws, which may not match with very few motherboards.If the screws are too large or too small to install,it is recommended to remove a screw from another place to fix it. Specification: Input:mini pcie interface (USB definition) Output:Dual 5PIN USB2.0 output (with two USB adapter cables) Package includes: 1 x mini pci-e to USB expansion card 2 x 5pin male to USB female cable 4 x screwsPlease note before buying:2.The mini-pcie 52PIN interface of the MINI PCI-E expansion card is defined by USB(mini pci-e has three definitions: USB, MSATA, MINIPCIE,the interface looks the same, but the function is different)please before buying Be sure to confirm that the interface on your motherboard is not defined by USB to prevent unnecessary returns.You can check whether there is a mark on the motherboard or ask the motherboard manufacturer. Please note before purchase:1.The appearance of msata and mini pcie slots are the same.Please confirm whether the interface on your motherboard is a mini pcie slot before purchg(generally the mini pcie slot is used for wireless network cards). Mini PCI to dual USB expansion card to full height card,you can cut the card into a half-height mini card according to your needs.Just use the tool to extend the white dotted line on the card and cut it(do not break it by hand,otherwise it is easy to damage the two screw holes in the middle). Dual USB2.0 female interface:mini pcie expansion card transfers the USB signal in the mini pcei to the USB socket,and boosts the 3.3V to 5V/1A voltage to the USB device,so that the interface can receive U disk,USB Bluetooth adapter,WiFi Adapter,etc.Conforms to USB2.0 specification and is backward compatible with USB1.1,USB interface supports hot plug. Mini Pcie to Dual USB adapter,through idle Mini PCI port to expand two standard USB2.0 ports, solve the problem of insufficient USB interface of computer motherboard.