Specification: Origin: Mainland China Type: PCI-E Riser Material: metal baffle + environmental glass fiber material Model: PH41 Support hard disk: MKey hard disk (NGFF is not supported) Transmission rate: 32gbps Card slot: X16/X8/X4 Product PCIE: no additional power supply required Support system: for Windows/Mac/Linux Status of the indicator light: it is always on when the power is on, and it flashes when reading and writing Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1Pc*Adapter Card 1.High-Speed PCIe Expansion: The PH41 NVMe to PCIe3.0/4.0 adapter allows for full-speed X4 expansion, enabling the connection of M.2 NVMe solid-state drives to PCIe slots. Experience blazing-fast data transfer rates and enhance your system's performance. 2.Durable Construction: Constructed with a metal bracket and eco-friendly fiberglass material, this adapter offers excellent structural strength and electromagnetic shielding. It ensures durability and reliable performance during extended usage. 3.Versatile Compatibility: The PH41 adapter is specifically designed for high-speed X4 PCIe3.0/4.0 slots. It supports MKey hard drives but does not support NGFF (Next Generation Form Factor) drives. Enjoy seamless compatibility with a wide range of M.2 NVMe solid-state drives. 4.Optimal Transfer Rate and Slot Options: With a maximum transfer rate of 32Gbps, this adapter provides rapid data transmission. It offers flexible slot options including X16, X8, and X4, catering to different PCIe slot configurations in your system. 5.Convenient Features: The PCIe interface of the adapter eliminates the need for additional power supply, drawing power directly from the slot. It supports multiple operating systems, including forWindows, forMac, and for Linux. The indicator light remains solid when powered on and flashes during read/write operations, providing status indication and activity feedback.