ASM1142 Type-C is a dual port ultra high speed USB 3.1 PCI-E add-on card that complies with the PCI Express 2nd generation (dual channel x2) specification for host systems. When connected to USB 3.1 compliant peripheral devices, it can transfer data at speeds of up to 10Gbps while maintaining compatibility with existing USB peripheral devices. USB 3.1 has a connection speed that is 2 times faster than USB 3.0 and 20 times faster than USB 2.0. It can output effective power to USB devices without the need for an additional power adapter connection Performance characteristics: PCI Express Basic Specification Revision 2.0 Dual Channel (x2). Compliant with Universal Serial Bus 3.1 specification Gen2. Compliant with xHCI (Scalable Host Controller Interface) specification revision 1.1. Expand the dual external USB 3.1 Super Speed+Type-A ports on the system. Each USB port has built-in overcurrent protection function. Support device remote wake-up function through USB keyboard or mouse. The heat exchange function allows devices to be connected/disconnected without shutting down the system power. Bus type: PCI-E X4 rev2.0, Dual channel x2, Serial rev3.1 Gen2 Main chipset: ASM1142 Media interface: USB Type-C+Type-A ports Transmission rate: Ultra high speed+(10Gpbs), ultra high speed (5Gbps), high speed (480Mbps), (12Mbps), low speed (1.5Mbps) Compatible devices: Universal Serial Bus USB 3.1/USB 3.0/USB 2.0/USB 1.1 &IO: Allocated by the system System support: WIN7, WIN10, WIN11, LINUX, etc Attention: Drivers need to be installed when using WIN7. And the speed is slow. Recommend using systems with 10 or more Colour:black Material:PCB+Metal Due to different product batches, the appearance , which does not affect the use Package Contents: 1 x PCI-E Expansion Card Adapter 1 x Low Profile Bracket 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.