Features: brand new and high quality By reducing the number of adapters and jumpers, one wire is directly connected to the interface, effectively reducing interface interference and line loss, ensuring data reliability and improving work efficiency. Effectively solve the problem of insufficient pci-e interfaces on the motherboard, one interface can be expanded to 4. The USB connector is gold-plated to reduce interference between interfaces and improve data integrity. The main control board adopts the direct power supply mode of the pci-e interface, and does not require an external power cord. The main control power supply is not affected by external interference and has higher stability. The plug-in card design can be directly connected to the motherboard interface without an extension cable, and can be connected to the chassis, which significantly improves the stability and reliability. Specifications: Item:PCI-E 1X 1 to 4 Expansion Card Number of interfaces: PCI-E X1, USB 3.0x 4 Product size: approx 120x66x56mm/4.72x2.6x2.2in Supported System : for Windows XP Win7 Win8 Win8.1 Win10 etc. Bus interface: PCI-E X1 (for X4, X8, X16 graphics interface) Gross Weight: 100g Working Invironment: 0-70 Note: Does not support USB devices. There may be slight size deviations due to manual measurement, different measuring methods and tools. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. Package includes: 1 x PCI-E 1X 1 to 4 Expansion Card