Type: USB3.0 four interface expansion cardInterface: PCI-E X 1Compatible PCI slot: X1-X4/x8/x16USB interface: 4 X USB3.0Transfer rate: 5Gb/s USB3.0Models concerned: classic office automationSupport system: Windows XP32/64 Windows 7(32/64) windows8/8.1 windows10high speed core, high compatibilitythe board comes with 2A power supply and does not need external power supply, 330 12X12mm inductor is better than 100 10X10mm.Each interface is equipped with an independent interface protection fuse, and immediately cuts off the power supply when external USB short circuit or overcurrent occurs, protects external devices and computer from damage, automatically returns to normal after troubleshootingEach interface equipped with independent regulated capacitor, ensure smooth power supply without interface, can also engage 250 Celsius with solid chip capacitor, strong endurancewith gold immersion process, good electrical conductivity, strong antioxidant capacity, stable transmission capabilityNet weight: 61gProduct size: 120X66X22mm / 4.73X2.6X0.87 inchco lour: blackMaterial: ABS metalPackage Contents:1 * Expansion card1 * screwOnly the above package content, other products are not included.Note: Light shooting 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.