Fangrui Product Details Four-channel Usb3.2 Expansion Card Each Channel Has Exclusive Bandwidth Each Channel Is Independently Powered Bus Rate: 20gt/s Bus Specification: Pci-e2.0x4 Interface Specification: Usb3.2 Gen1*8 Interface Rate: 5gbps Interface Speed: About 400mb/s Master Control: Asm1812*1+asm3042*4 Interface Specification: Usb 3.2 Gen1*8 Interface Rate: 5gbps Bus Specification: Pci-e 2.0 X4 Bus Rate: 20gbps Installation Condition: Free Pci-e X4, X8, X16, Slots Power Supply: Pci-e Driver Support: Win7, 8, 10, 11, Linux, Operating Temperature: 0~60storage Temperature: -20~80input Voltage: Dc12v Input Current: 4a Different Batches May Have Different Screen Printing/appearance, But It Will Not Affect The Use Colour:black Material:pcb+metal Package Contents: 1 X Usb 3.0 Pci Express Adapter Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection 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