The MobileSTOR MS1UT Series is a unique external 3.5" SATA Hard Drive enclosure with a removable HDD tray. The combination of fanless design and aluminum housing provide quiet yet cool operation. With portability in mind, the compact MS1UT weighs only 2.2 lbs. The removable hard drive tray is interchangeable with certain MobileSTOR or MobileRAID series models to provide ultimate compatibility between various units. The versatile MS1UT can be placed either vertically or horizontally on your desktop. This unit features USB 2.0 and eSATA dual host interfaces for supporting both PC and Mac OS.