- Internal RAID controller (no additional hardware needed).- Supported RAID mode: 0/1/3/5/10 & BIG.- Flexible interface selection (USB 3.0 & eSATA).- The device can be used at USB 2.0 and USB 1.1, too.Automatic fan control with built-in thermal sensor or manual mode / 3 levels of speed:- LOW < 45°C 1200rpm.- MEDIUM 45 - 54°C 1800rpm.- HIGH > 55°C 2500rpm.