BPN-DE340SS is 's 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. Aluminum Frame, designed for heavy-duty purpose. Support SAS I/II, SATA I/II/III Hard Drives. Integrative shaping aluminum design for quickest heat sink. Data Transfer Rate up to 6.0 Gb/s. Aluminum front bezel with metal key lock mechanism for double safety. Removable fan cover for easy maintenance. Multi-functional LED Indication. Support Hot-Swap and RAID Configuration (need an additional RAID controller). 3TB Hard Drives Compatible. RoHS Compliance Version: Yes. Standard Drive Bays: 5.25-" Drives: 3. Hotswap: 3.5: 4. Hotswap HDD Type: 3.5-" SAS I/II and SATA I/II/III. Indicators: Blue for Power on/Purple for HDD Access. Security: Key Lock. Material of Front Bezel: Aluminum. Material of Handle: Aluminum. Material of Main Chassis: Aluminum. Color of Front Bezel: Black/Blue/Red/Silver. Color of Main Chassis: Black. Cooling Fan: 1x80mm. Red Handle. Dimensions: 5.71-" W x 4.92-" H x 7.79-" D - 145.0mm W x 125.0mm H x 197.9mm D.