Description: The NexStar 3 features eSATA (external Serial ATA) and USB 2.0 interfaces offering speeds up to 3Gbps or 480Mbps respectively. This flexibility allows you to use your hard drive at its full performance where eSATA is available and still have the option of using USB where it's not. The NexStar 3 is an ideal way to store and transfer large amounts of data in an enclosure that matches your style! Features: Aluminum Casing Cools Down Your Hard Drive Transfer Rates Up to 3Gbps W/ eSATA Transfer Rates Up to 480Mbps W/ Usb 2.0 (12Mbps W/ USB1.1) Easily Add Storage to Any System With SATA or USB Hot-Swappable: Plug And Play Without Rebooting Attractive Blue LED Indicates Power/HDD Activity Specifications: Interface : SATA to eSATA& USB 2.0 Dimension : 132 X 80 X 15 mm Supports : Window 98SE / ME / 2000 / XP, Mac OS 8.6 & Above