Features: Brand new and high quality Transmission speed is fast, and the theoretical transmission speed 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 that of USB 2.05v/0.5a. Uses VL805 high-order main control chip; PCI-Express interface is used, and four high-speed data transmission interfaces of USB3.0 interface are bridged by VL805 main control. Low-loss alloy powder is die-cast, with low impedance, no lead end, small parasitic capacitance, solid structure, precise product, lasting anti-rust, small volume, and large current. Uses multi-layer circuit board for lossless transmission: uses four-layer circuit board: has 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 connector gold finger, high gold plating: strong oxidation resistance, good conductivity, and wear resistance. Interfaces can be matched flexibly: they can be expanded to 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 Note: Due to different monitors and lighting effects, the actual color of the item may differ slightly from the color shown in the pictures. Thank you! Please allow 1-2 cm measurement deviation due to manual measurement. Package includes: 1x PCIE to USB3.0 Dual 19/20P Expansion Card