The Icy Dock MB991K-B is a solidly built, mobile rack that houses a 2.5" drive inside a 3.5" chassis. The MB991K-B is compatible with any system that has SATA or SAS connectivity and supports SATA6 level data transfers. Whether you use the MB991K-B in the luxury of your own home or under the most demanding outdoor conditions, it will provide the convenience and security we have come to expect from an Icy Dock product.