Feature: 1. Fast Transmission: This adapter card supports U.2 NVME 2.5 inch hard drives for faster data transmission rates. Connected to the PCIE4.0 bus for higher transmission speeds, users can instantly complete the transmission of large volume data, improving work efficiency and user experience. 2. Multi Function Application: The adapter card not only supports NVME hard drives, but also is compatible with Serial ATA hard drives, offering a wider range of applicability. Users can choose to adapt different types of hard drives according to their needs, offering flexibility and meeting different scenario needs. 3. High Stability: The adapter card is made of PCB materials and has good heat dissipation performance and stability, ensuring the stability and endurance of the hard drive during operating. Users can use it with confidence without worrying about the hard drive overheating or getting damaged due to long hours of work. 4. Easy Installation: PCIE U.2x8 dual disk adapter card is designed to be simple and user friendly, with an easy and quick installation process that doesn't require complex operating steps. 5. Wide Compatibility: PCIE U.2x8 dual disk adapter card supports downward compatibility of PCIE4.0, PCIE3.0 supports X16 or X8 slots (the motherboard needs to support PCI X4 split). Specification: Item Type: U.2 Dual Disk Adapter Card Material: PCB Transmission Interface: U.2 and 2.5 Inch Serial Advanced Technology Attachment System: for Win for Linux Support: PCIE 4.0 Support: X8 or X16 (The Motherboard Needs to Support PCI X4 Split) Support: Dual SSD U.2 2.5 Inch Serial ATA Interface. Package List: 1 x U.2 Dual Disk Adapter Card1 x Baffle 1 x Screw Pack1 x Screwdriver 2 x Serial ATA Cables