Function: M.2 M-key PCI-E4.0 2280 NGFF to PCIe X4 extension cable can convert the M.2 slot on the motherboard into the PCIe X4 slot, which is used to connect various PCIe X4 devices. High-speed expansion: M.2 M-key PCIe 4.0 2280 NGFF to PCIe X4 adapter extends the 2280 M-key system with a PCIe X4 socket interface. It is fully compatible with PCIe Gen 3 and Gen 4. PCIe 4.0 Performance with NVMe Support: This cable delivers PCIe 4.0 signaling via NVMe protocol and allows data transfer speeds of up to 64Gbps. It supports NVMe 1.2 and is compatible with SSDs and expansion cards, while remaining backward compatible with PCIe 3.0. Cable length: 20 cm. Free SATA Power Cord The package includes a 12V SATA power cord. Please note: 12V power is only available when the cable is connected.(Please make sure the motherboard is turned off when installing this product) Safe installation instructions: To avoid damage to the device, make sure the installation direction is correct. Due to the sensitive structure of the magnetic core inside the product, please hold the PCB hardware part during the disassembly process to avoid damage to the magnetic core. Does not support hot plugging. Color: Black Material: Metal+Plastic Package Contents: 1*Adapter cable 1*SATA power cord 1*Screwdriver 2*Screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.