Features: and high quality Provides 4 independent USB 3.0 ports with a total bandwidth of 20Gbps. The transfer speed of each USB 3.0 interface is up to 5Gbps; 4 external USB 3.0 ports, 10 times faster than USB2.0; PCI-E X4 design, for PCIE X4, X8, x16 slots. Industrial grade high performance USB adapter card; Supports USB debugging function on all speed ports. Compliant with USB3.0 specification, backward for USB2.0 and USB1.1. Complies with revision 2.0 of the basic PCI for Express specifications; Supports PCI bus power management interface specification revision 1.2. Supports 5G / 480/12 / 1Mbps USB data transfer rate; Supports types of control, batch, flow, interrupt and synchronous transmission. Specifications: Expansion type: industrial grade USB3.0 adapter card Main chipset: P17C9X2G + ASM1042 Bus Type PCI for Express 2.1 X4 2 x built-in 19-pin USB expansion interface 1 x Integrated 15-pin SATA power interface Power input: 15-pin SATA CD-ROM type power connector Port voltage: max. 5V / 900Ma, each usb3.0 port. Working temperature: 0 -60Relative humidity: 10% -90% (non-condensing) Storage temperature: -20 ~ 80Relative humidity: 5% -90% (non-condensing) System requirements: for Windows 10 / for Windows 8 / for Windows 8.1 / for Windows 7 / for Windows Vista / XP / 2000 server; for Windows Server 2012/2008 R2 / 2003 MacOS 10.x, Linux2.6.31 or higher Industrial grade high-performance USB expansion card, suitable for all USB interface devices, including industrial cameras, SSD / HDD cases, flash drives, virtual reality playback boxes, digital devices, etc. Color : GreenMaterial: PCB + metal Note: Light and different displays may cause the color of the item in the picture to be a little different from the real thing. The measurement allowed error is +/- 1-3cm. Package includes: 1 x PCI for Express X4 P17C9X2G 8-Port USB3.0 card