FS-U4-Pro allows you add four USB 3.0 super fast 5Gbps portson your desktop computer for video ,audio ,photos or files transfer. Build in Self Power Technology for high power-consuming data devicessuch as hard disk. What is Feb Smart Self Power technology? Self Power Technology is a solution to add more power supply for USB expansion card.The old version PCI Express USB card you see on the market need to plug a power cable from the desktop computer power control center.Even you add additional power on it sometime it lack of power when you running few high power-consuming devices simultaneously like hard disk.PCI Express X1 Slot can provide75W max almost 12V/6A. We add a voltage transformer on the USB card get 5V/14A max power. Then we add a power module on each USB ports distribute current for each port 5V/2A.Most of the high power-consuming devices need 4~8W which means our USB expansion card can be running few the high power-consuming device simultaneously in high speed. To protect data device we add on a safety electric circuit protector for each ports. Do not worry data loss or burning the data device now.Choose fast and safe data connection with Feb Smart. Product Value: Add four Ports USB 3.0 for your desktop computer by PCI Express slot-Each port 5Gbps data transfer speed for fast connection. Bluid in Feb Smart Self Power Technology-Provide sufficient power(8A max) supply for USB data device. Experience fast data transfer all the time. Running High power-consuming device simultaneously in all USB ports now. Internal USB card from mother board though a PCI Express slot-Ensure stable connection and lost few data transfer speed. Do not have lost connection issue like external USB HUB does. Package: 1XFS-U2-Pro 1XUser Manual 1XMini CD 1x Mounting Screw