Drive: SATA OS Supported: Supports Windows 2000, XP, Vista, Windows 7 and Windows Server 2003 and 2008, MAC and Linux. Power Supply: Input: AC 100-240V, 50Hz/60Hz Output: DC +12V/5A Max. Power: 60W Dimensions: 5.3"W x 7.0"H x 9.7"D Weight: 4.5 lbs. Features: Form Factor: Compact Tower Interface: USB 3.0 (backward compatible with USB 2.0) and eSATA Maximum Capacity: 12TB Auto Rebuilding: Yes Drive Interface: 4 x 3.5" SATA Cooling Fan: 3" Ball Bearing Fan Control Interface: RAID Switch Trayless design and dust-proof front cover Status Indicators: Cooling fan status, hard drives status and power LEDs. Package Contents: MS4UT+B Power Cord & Power Adapter USB 3.0 Cable eSATA Cable 8 x HDD screws 4 x HDD Handle Screw Driver Quick Installation Manual