Features: brand new and high quality Super fast and high capacity transfer solution, stable and reliable. Fully compliant with PCI for Express Base Specification Revision 2.0. Supports simultaneous operation of multiple USB 3.0, USB 2.0 and USB 1.1 devices. With two power modules, rated output current 4A. 2A current from each port, no need to connect. Can be used normally! Supports for Windows 7 (32-bit/64-bit), for Windows XP (32-bit/64-bit), for Windows 8 / 8.1 / 10(plug and for play compatible). Specifications: Type: 2 external USB 3.0 port expansion cards Chipset: For NEC 720202 Bus Modes: PCI-E x1 Compatible Slot: PCI-E x1 / x4 / x8 / x16 USB interface: 2 external USB 3.0 ports Transfer speed: USB3.0 5Gb/s Note: There may be little error of size for manual measurement. The color deviation may be different due to different monitor settings, please understand. Package includes: 1PC x 2 Port USB 3.0 PCI-E Expansion Card