CAUPT Hard Drive features a lightweight aluminum case that can fit in your shirt pocket to take your important data wherever you go. Powered by USB cable alone, it defies the normal boundaries of an external hard drive. Indeed, even as the veritable definition of portability, it makes no sacrifice in storage space this powerful 2.5" drive is proof that good things come in small packages. This hard Drive boasts exceptional heat dissipation without a fan for near silent operation. It is also remarkably durable, with state of the art shock absorption. The stylish enclosure is constructed of solid aluminum, keeping the hard drive operating at a safe and cool temperature while protecting the data within.