The 4-Port RAID SATA III to M. 2 B+M Key Adapter is a versatile hardware solution designed to enhance storage capabilities within a computer system. Leveraging the Marvell 9236 chipset, this adapter provides support for up to four SATA III (6Gbps) connections with RAID. It interfaces with the host system via a PCI-e 3.0 x2 connection, delivering efficient and high-speed data transfer rates.