Lexar NM620 M.2 PCIe NVMe SSD - 256GB Capacity, M.2 2280 Form Factor, PCIe Gen3x4 Interface, Up to 3500Mbps Sequential Read, Up to 1300Mbps Sequential Write Speed, Up to 92/240K IOPS, 3D TLC NAND Flash, Energy Efficient, NVMe 1.4 Standard, Retail Box, 1 Year Warranty.