BPN-DE340SS is iStarUSAs third generation tray-less hot-swap hard drive cage. It features the latest transfer rate technology of 6.0 Gb/s (SATA I/II/III and SAS I/II), and is RAID capable. It also comes with adjustable fans speed and ultra-quiet cooling fans. The LED Display lights features the new blue light by popular demand. Heat dissipation is enhanced by the full aluminum construction and a 80mm fan. SATA power connector increases compatibility with most power supplies. The metal key locks help secure your hard drives and prevent unauthorized access. Converting three standard 5.25" drive bays into four usable hard drive slots, it is economically designed to maximize your investment.