Features: Brand new and high quality Four slots provide great expandability, good electrical conductivity, and improved data transfer efficiency. High-quality PCB board, high temperature resistance, for long-term use. Connects directly to the motherboard without extension cables; can be mounted to the chassis. The plug-in card design connects directly to the motherboard interface without an extension cable and can be attached to the chassis, significantly improving stability and reliability. Effectively solves the problem of insufficient PCI-E interfaces on the motherboard; one interface can be expanded to four. Specifications: Bus Port: PCI-E Interface Type: PCI-E 1X to 4-port USB 3.0 Applicable Slot: PCI-E X1/X4/X8/X16 Size: Approximately 120x81x61mm/4.72x3.18x2.4in Weight: Approximately 48g Supported Operating Systems: DOS, Linux, Windows XP/7/8/10 Note: Slight size variations may occur due to manual measurement, different measurement methods, and tools. The image may not reflect the item's actual color due to different photographic lighting, angles, and displays. Package Includes: 1 x PCI-E 1 to 4 Riser Card