The transmission speed is fast, and the theoretical transmission rate is 5Gbps/S, which is nearly 10 times faster than USB2.0 480Mbps/S; The output power is and the output power of each port is 5V/1A, which is twice as high as that of USB2.0 5V/0.5A. Uses an on-resistance power MOSFET to replace the rectifier diode, so it can reduce the loss of the rectifier. Improve the efficiency of the for DC/for DC converter to meet the needs of low voltage and high current rectification. Small size, large current. Low-loss alloy powder die-casting, low impedance, no lead terminal, small parasitic capacitance, solid and firm structure, accurate product, long-lasting rust prevention. PCI-E gold finger: PCI-E 2.0 contact gold finger, high gold plating: strong oxidation resistance, good conductivity and wear resistance. Each 19P/20P output port is equipped with a 6V3A resettable fuse. When a short-circuited USB device is connected, the high temperature generated by the short-circuit current causes the fuse's internal fuse to instantly enter a high-resistance open state, thereby limiting the short-circuit current. When the fault disappears and the temperature drops, the fuse returns to its original low-resistance conduction state. Specifications: Product Name: PCI-E to USB 3.0 Dual 19/20P Expansion Card Input interface: PCI-E x1, Compatible X4/X8/X16 Interfaces can be flexibly they can be expanded into two 19P/20P interfaces. Color: Black Material: PCB+Metal Package Contents: 1* PCI-E to USB 3.0 Expansion Card Only the above package content, other products are not included. Note: Light reflection 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.