Type: USB3.0 four-interface expansion card Interface: PCI-E X 1 Compatible PCI slot: X1-X4 / x8 / x16 USB interface: 4 X USB3.0 Transfer rate: 5 Gb / s USB3.0 Applicable models: conventional office Support System: XP32 / 64 7 (32/64) windows8 / 8.1 windows10 high speed operation core, high compatibility the card comes with a 2A power supply and does not need external power supply, 330 12X12mm inductor is 100 10X10mm. each interface is equipped with an interface protection fuse and immediately shuts off the power in case of external USB short circuit or overcurrent, protects external devices and the computer from damage, automatically becomes normal again after troubleshooting each interface equipped with an regulated capacitor, guarantees a smooth power supply without interface, can also undertake 250 ° Celsius with a solid chip capacitor, a strong endurance with gold immersion process, good electrical conductivity, strong antioxidant capacity, it can stable transmission Net Weight: 61g / pcs Product Size: 120X66X22mm / 4.73X2.6X0.87 inch colour:black Material:ABS+ metal Package Contents: 2 * Expansion Card 2 * Screw Only the above package content, other products are not included. Note: Light 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.