DESIGNED FOR DEMANDING PROFESSIONALS. Integrated, and assembled in the United States to satisfy the requirements of demanding audio and video professionals, the Rocpro line can support a Solid State Drive "SSD" or a fast SATA high-capacity 3.5" hard drive, and has a unique stylish and ruggedized design that will complement any desktop. It features a recycled aluminum case that can be conveniently stacked or mounted vertically. With its built-in power supply and fan-less and quiet operation, the Rocpro can be easily moved from one desktop environment to another using the provided carrying case. The Rocpro is compatible with both Windows® and Macintosh® environments without any software installations. The Rocpro external hard drives deliver extraordinary performance, rapid file transfer speeds (up to 5,000 Mbits/s via USB 3.0, up to 800 Mbits/s via FireWire 800 or up to 3,000 Mbits/s via eSATA), and proven reliability for both Mac and PC users. And because it provides up to 4TB single hard drive; one of the first of its kind, this device is one of the most, if not the most, versatile desktop and/or portable external drives in the world. The Rocpro 900e is made with aluminum alloy, making this enclosure both ruggedized and durable. An exclusive shock-absorbing mechanism is built into the enclosure. Its function is to keep the hard drive secure within the casing, while dissipating the heat produced by the hard drive. Features: Desktop and/or Portable external storage drive Aluminum casing Built-in Power Supply Carrying Case included Incorporates SATA Hard Drive USB 3.0 (2.0), 2x FireWire 800 and eSATA connections Speeds up to 5,000 Megabytes per second Enhanced with shock-Absorbents mechanism Compatible with both Windows® and Macintosh® environments Power: Auto-Switchable 240VA/100VA International use Direct (AC) plug into electricity (no bulky adaptor required) Includes all necessary cables The built-in power supply offers the user added convenience by eliminating the need to carry nonstandard and sometimes hefty adaptors and cables that are normally required to power typical hard drives. The power supply contained in the Rocpro line is Auto-Switchable 240VA/100VA (will work internationally) and uses any standard computer cable, no matter what country you are in. In addition, due to the heat dissipating automatically through the enclosure, there is no fan installed, which makes the device virtually silent while it is operating, which makes the device virtually silent while it is operating.