Fits 8 x 5mm to 7mm 2.5 SATA hard drives or SSDs in a single external 5.25 bay for high performance RAID applications ^^ Connected by 2x Mini-SAS HD data cables for all 8 bays, for plug-and-play compatibility with most motherboards and RAID cards ^^ Requires only 2 x 15pin SATA power connectors to power all 8 bays (drives) ^^ Dual 40mm user-controllable fans, with settings for high, low, and off ^^ Rugged Heavy duty full metal construction with commercially designed for medical &military systems, media servers, workstation, HPCs and IPCs, approved & used by Tier 1 companies