Features: brand new and high quality 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 higher, and the output power of each port is 5V/1A, which is twice as high as that of USB 2.05v/0.5a. Adopt VL805 high-order main controller chip; PCI-Express interface is used, and four high-speed data transmission interfaces of USB3.0 interface are bridged by VL805 master control. Low-loss alloy powder is die-cast, with low impedance, no lead end, small parasitic capacitance, firm structure, accurate product, lasting rust prevention, small volume and large current. Adopt multi-layer circuit board for lossless transmission: adopt four-layer circuit board: have very strong anti-interference ability; It effectively ensures the stability of PCI-E high-speed signal transmission, data integrity and impedance matching. PCI-E X1 gold finger: PCI-E 2.0 X1 contact gold finger, high gold plating: strong oxidation resistance, good conductivity and wear resistance. Interfaces can be flexibly matched: they can be expanded into two 19P/20P interfaces. Specifications: Name: PCIE to USB3. 0 dual 19/20P expansion card Input interface: PCI-E X1 for X4/X8/X16 Size: approx. 12x6.5x6.5cm/4.72x2.56x2.56in Package Includes: 1x PCIE to USB3. 0 Dual 19/20P Expansion Card note: Due to different monitor and light effect, the actual color of the item may be slightly different from the color shown in the pictures. Thanks! Please allow 1-2cm measurement deviation due to manual measurement.