The red 2 x 5.25" to 3 x 3.5"SAS/SATA 6 Gb/s Trayless Hot-Swap Cage from iStarUSA supports transfer rate technology of 6.0 Gb/s (SATA I/II/III and SAS I/II) and is RAID capable. It comes with adjustable fan speed, ultra-quiet cooling fans and multi-function LED Indicator. Heat dissipation is enhanced by the full aluminum construction and a 2.75" (70mm) fan.The hot-swap cage features a SATA power connector, which increases compatibility with most power supplies. The metal key locks help secure the hard drives and prevent unauthorized access. To maximize your investment two standard 5.25" drive bays are converted into three 3.5"usable hard drive slots.