Description: An effective solution to the motherboard PCI-E interface is not enough, an interface can be extended out 4-port usb3.0 The use of plug-in design, without extension cable directly into the motherboard interface, and can be fixed to the chassis, the stability and reliability greatly improved! The main control board adopts PCI-E interface direct power supply , no need to external power cord, so that the main control board power from outside interference, higher stability! Reduce the number of adapter and adapter cable, a line directly to the interface, effectively reduce the interface interference and wire loss, to ensure data reliability, thereby improving work efficiency Specification: Interface Type: PCIE 1X to 4 USB Bus Type: PCI-Express X1 Applicable Slot: PCI-E X1, X4, X8, X16 Transmission speed: 5Gbps Use: For Mining Support system:for Linux, Windows XP/7/8/10 Weight:70g Size:120x67x57mm/ 4.7x2.6x2.2 inch Package Includes: 1 x PCI-Express Riser Card