This new BUSlink pocket size hard drive provides the most popular interfaces: eSATA & USB 2.0. It draws power from the USB bus even when using eSATA; it does not require a power adapter. At the size of 2.5" and weighing only 1.5 lbs., the BUSlink Disk-On-The-Go Lite is so compact - it will fit in your pocket. Plug and play installation means you can be using the drive within minutes after taking it out of the box. It enhances the capabilities of your existing laptop or desktop, and it is perfect for businessmen, home users, mobile users, MP3 storage and gamers. eSATA interface for faster transfer USB interface for easy plug and play operation Draws power from the USB bus even when using eSATA 7200rpm for high performance Easy to carry anywhere with its lightweight slim design Platform support: PC/Mac