Features: Comes with 4 power modules, 4 independent insurance, 4 solid capacitors, 2 19Pin USB3.0 interfaces on the board. 2 x 19-pin USB3.0 connectors: Allows you to extend 4 USB 3.0 ports to your desktop using the two internal 19-pin USB3.0 ports. High quality master IC: advanced technology, low heat, fast and stable operation, perfect welding, excellent workmanship, uniform layout, neat, to maximize interference and greatly improve stability. 4 Independent insurance: Each interface is equipped with independent protection insurance. When the external USB device is shorted and the current is too high, the power can be cut off instantly to protect the devices and computer from damage. Once the fault is resolved, the system will automatically return to normal. 4 solid capacitors: Each interface is equipped with an independent regulator capacitor to ensure smooth power supply to each interface. And capacitors using solid-state chip can withstand temperatures up to 250. Super power module: Each USB 3.0 interface is equipped with an independent power module, and each interface is exclusively provided with 2A power supply, a total of 8A. In addition, the inductor adopts 12mm*12mm closed super-power inductors. High-quality baffle: A high-quality fixed baffle is used to fix the expansion card on the chassis. And these baffles, treated with bending hardening on both sides, can withstand greater force. Gold-plated PCI-E x1 interface: Thick gold-plated PCI-E interface for more stable contact and transmission. Not subject to data distortion. Specifications: Number of interfaces: 1*PCI-E x1, 2*19pin USB3.0 connector Transfer speed: up to 5Gbps Current: 2A for each USB port System: winXP, win7, win8, win8.1, win10 Applicable slot: For PCI-E X1 X4 E to 2 Port 19Pin USB3.0 Card Adapter 1 x Low Profile Baffle 1 x CD 1 x Screw Note: Due to manual measurement, please allow 1-3mm error, thank you.