1. Reversible USB-C/Type-C connector design (plugs in both ways) allows you to conveniently connect cable in any orientation 2. Supports up to 8 USB devices: 4 Port TYPE C + 4 Port USB3.2 GEN2 3. 4 external USB-C + 4 external USB3.2 GEN2 Type-A female connectors. 4. Supports simultaneous operation of multiple USB 3.2/2.0/1.1 devices. 5. Can be used normally without external power supply. Each TYPE C port can support 2A high current output, and each TYPE-A supports over standard 900MA to 1A current output. Premium material and workmanship, high quality and long lifespan. Bus Type:PCIE X4, Compatible PCIE X4/X8/X16 Main Chips:ASM3142+VL822+VL822 Output interface:TYPE-A*4 + TYPE-C*4 Interface specification:USB3.2 GEN2 Product Rate:10Gbps+10Gbps (total 20Gbps) Support size:full-height baffle/does not support small chassis Support System:for 7/10/11, Linux OS. (WIN7 need install the usb card driver And the speed is slow. It is recommended to use on systems above 10) About When used alone, a single port can theoretically achieve a speed of 10Gbps. When 4 USB-A ports are used simultaneously, they share 10GB, and when 4 USB-C ports are used simultaneously, they share 10GB! Colour:Black Material:PCB+Metal Package Contents: 1 x USB3.2 GEN2 TYPE-A*4 + TYPE-C*4 PCIE Card 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 +/- 1-3cm.