The OWC Mercury On-The-Go FireWire USB 2.0 Storage Solution provides maximum storage in an ultra-portable, totally bus powered design! Stylishly engineered in a sleek, impact-resistant acrylic enclosure, the Mercury On-The-Go Pro incorporates shock-isolation technology to give maximum protection for your precious data inside. The Mercury On-The-Go Pro is a true must-have for users like you who are seeking high-performance and highly reliable storage weighing less than 11 ounces and that is small enough to fit in your pocket.