1. Adopt nec720201 master chip, high-speed computing core, high compatibility 2. Comes with 2A power supply module, no need for external power supply, 330 12mmx12mm closed type inductors. 3. Each interface is equipped with an interface protection insurance. When the external usb device is short-circuited, or the current is too , etc., the power can be cut off instantaneously, so that the external device and the computer are protected from damage, and the fault is automatically restored after the fault is removed. 4. Each interface is equipped with an voltage regulator capacitor, which can that no interface power supply is stable, and the capacitor adopts solid-state patch type, which can withstand 250 Celsius high temperature endurance. 5. Adopting the immersion gold process, it has good electrical conductivity and strong ability, which can the transmission is more stable. Type: 4-port USB 3.0 PCIe expansion card Interface: PCI-e x1, compatible with PCI-e x1/ x4/ x8 / x16 USB interface: 4-port USB 3.0 Transmission rate: 5Gb/s USB3.0 Applicable models: for desktop PC Supported system: for Windows XP 32/64bit, Windows 7 32/64bit, Windows 8/8.1, Colour:black Material:PCB Size:120x67x15mm Package Contents: 1 x Expansion card 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.