The ASM1142 Type-C is a dual-port speed USB3.1 PCI-E add-in card that complies with the PCI- Gen 2 (dual x2) specification for host . When connected to USB 3.1 compliant peripherals, it can transfer data at speeds up to 10Gbps while maintaining compatibility with existing USB peripherals. USB3.1 performance is 2 times faster than USB3.0 connection speed is 20 times faster than USB2.0 connection. It outputs effective power to USB devices without the need for an additional power adapter connection. Device remote is supported via USB keyboard or mouse. The hot-swap feature allows devices to be connected/disconnected without powering down the system. Performance characteristics: PCI Base Specification Revision 2.0 Dual (x2). Compliant with Universal Serial Bus 3.1 specification Gen2. Compliant with the xHCI (Extensible Host Controller Interface) specification revision 1.1. Expands dual external USB3.1 Super-Speed+ Type-A ports on the system. Each USB port provides +5V DC/900mA power output to USB devices. Overcurrent protection is built into each USB port. Bus Type: PCI-E rev2.0, Dual x2, Serial rev3.1 Gen2 Main Chipset: asmedia/ASM1142 Media Interface: 2 x USB Type-C ports Transmission rate: Speed+ (10Gpbs), Speed (5Gpbs), High speed (480Mbps), Full Speed (12Mbps), Low Speed (1.5Mbps) Compatible Devices: Universal Serial Bus USB3.1 / USB3.0 / USB2.0 / USB1.1 &IO: allocated by the system System requirements: Windows Server2003/Vista/Win 7/Win 8/Win 8.1/Server2012 x64 (32&64bit) One available PCI x4 or x16 slot (PCI 2.0 recommended) Note: PCI- x1 slot is not supported Use environment: Operating temperature: 0~60C (32~140F) Working humidity: 5%~95%RH Storage rature: -20~70C (-4~158F) Material: PCB Color: Green Package Contents: 1 x Expansion Card 1 x CD 1 x Short Iron Piece Only the above package content, other products are not included. Note: Light 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.