The SAT35401U is rack-mountable 4-bay trayless HDD enclosure enables to mount and hot-swap up to four 3.5" SATA or SAS hard drives into 1U of rack/cabinet storage space. To ensure maximum performance and versatility, the enclosure offers support for SATA/SAS HDD speeds up to 6.0Gbps with a mini SAS interface and is fully compatible with RAID controllers for enhanced storage applications. The rugged steel rack-mountable chassis with 3 built-in fans makes it an ideal solution for any server environment that requires hot-swappable storage. The SAT35401U is backed 2-year warranty and lifetime technical supported.