Product Features: Connect M.2 NVMe and M.2 SATA drive to a desktop computer. Transfer speed 8Gbps. M-Key NVMe and AHCI drives interface directly with the PCIe bus. B-Key SATA drives require the use of a SATA cable (not included). Fits a PCIe x4, x8, or x16 slot. Robust design includes mounting brackets and a heat dissipating PCB. The M.2 drive communicates directly with the PCIe and SATA bus. Both slots can be used. M.2 NGFF to PCI-E X4 transfer card, there are 4 fixed holes on the board, 22*32 mm, 22*42 mm, 22*60 mm, 22*80 mm, respectively. It supports M.2 for Samsung PM961, 960EVO, SM961, PM951, sm951, INTEL 600P, LITE-ON T10 and other NVME and SATA protocols. Product Specification: Type: Dual M.2 NGFF to PCIe X4 Adapter Card Compliant with: m.2 size: 2230 2242 2260 2280 support M.2 Type: M-Key and B-Key M.2 Interface: PCI-E X4 Suitable slot: PCIe X4, X8, X16 transfer speed: 8Gbps Support System: Windows, Linux Mac OS Package Included: 1 x Dual M.2 NGFF to PCIe X4 Adapter Card 1 x 4U Chassis Backplane Bracket 1 x 2U Chassis Backplane Bracket