Features: Brand new and high quality M.2 interfaces of this extension cable needs to be plugging into M.2 NGFF SSD hard disk interfaces supporting NVMe protocol on motherboards. PCIe slot can be plugging into PCIe x16 devices, but the speed can only run PCIe x4 (provided that M.2 interfaces of your machine is PCIe x4). The length of wire is between 50cm and 60cm. In order to minimize signal attenuation of the extension cable, wire is thick, so be careful when installing it, so as not to damage the interfaces. 3.3V is provided on the PCIe slot (many devices cannot be used without 3.3V). PCIe x1, PCIe x4, and PCIe x16 devices can all be used (the speed can only be PCIe3.0 x4). Specifications: Material:Plastic Package Includes: 1 Set Expansion Card note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.