super speed 5Gbps PCI-Express USB 3.0 card adapter 2 internal +2 external ports with VLI chipset 1.Compatible with 2.0 1.1 2. Transfer Speed up to 5.0Gbps 3. Chipset:VLI805 4. For Windows XP Vista Win 7 5. Extend 4 USB 3.0 ports (1). Features: 1. For many function of USB compatible with USB 2.0 and USB 1.1. 2. Adapt for X4 interfaces of USB 3.0 2 internal and 2 external ports 3. Transfer rate Speed up to 5.0Gbps. 4. Meet with PCI-Express 2.0 standards with top-quality updated chipset VLI805 5. Full solid capacitor high-quality raw materials first-class workmanship. 6. Low power consumption and operating steadily well.