1、Plug and play. Extend one interface into dual interfaces, effectively solving the problem of motherboard PCI-E interface shortage. 2、Adopting plug-in design, without using extension cable, this product can be directly inserted into the motherboard and fixed on computer case, which has improved the stability and reliability greatly. 3、The motherboard adopts direct power supply mode through PCI-E interface, no external power supply line required, so that the motherboard power will not be affect by external interference and the stability is strong. 4、Have reduced the number of adapter and cable, which can effectively reduce the interface interference, and wire loss, to ensure data reliability, improve work efficiency. High-strength anti-deformation baffle, stable, solid and durable. 5、Thick gold-plated fingers for more stable contact and transmission. Not prone to data distortion. Expansion of 2 USB3.0 interfaces, fast transmission speed, stable performance, transfer rate up to 5GBPS. Description: This PCI Express card can expand one PCI-E interface to 2 PCI-E interface. It can be directly plugged into the motherboard interface. The USB interface corresponds to the current USB 3.0 standard with a maximum transfer speed of up to 5Gb/s. Features: Plug and play. Extend one interface into dual interfaces, effectively solving the problem of motherboard PCI-E interface shortage. Adopting plug-in design, without using extension cable, this product can be directly inserted into the motherboard and  fixed on computer case, which has improved the stability and reliability greatly. The motherboard adopts direct power supply mode through PCI-E interface, no external power supply line required, so that the motherboard power will not be affect by external interference and the stability is strong. Have reduced the number of adapter and cable, which can effectively reduce the interface interference, and wire loss, to ensure data reliability, improve work efficiency. High-strength anti-deformation baffle, stable, solid and durable. Thick gold-plated fingers for more stable contact and transmission. Not prone to data distortion. Expansion of 2 USB3.0 interfaces, fast transmission speed, stable performance, transfer rate up to 5GBPS. Specifications: Bus interface: PCI-E (compatible with x4 x8 x16 graphics card interface) Number of interfaces: PCI-E USB interface x 2 Support system: Support for DOS linux winxp win7 / 8/10 os Product Size: 120MM (baffle) x 67MM x 57MM / 4.72inch x 2.64inch x 2.24inch Line length: 0.6M / 1.97ft Product Interface: PCI-E slot Package weight: 240g Package List: 1 x PCI-E to Dual Port PCI-E Adapter 2 x PCI-E 16x Riser Card 2 x USB3.0 Cable 2 x Power Cord 2 x PCI-E x1 Riser Card