Cavalry Storage CADA00ASA2-H CADA-SA2 Series 500 GB 3.5-Inch USB/eSATA RAID Disk Array with eSATA Kit (Black) Preconfigured to RAID 1; also configurable to RAID 0 and RAID 0+1 eSATA (3.0 Gbps transfer speed) USB 2.0 (480Mbps transfer speed) Unit Includes - One (1) year manufacturer's warranty, two (2) 1 TB 3.5-inch hard drives installed in a dual bay enclosure with built-in fan, USB cable, eSATA cable, eSATA bracket, AC adapter, Resources CD and Quick Start Guide System Requirements - Available USB or eSATA port, Mac OS 9.x or newer, Windows 98SE / Me / 2000 / XP / Vista