Iomega 33744 UltraMax Pro Hard Drive - eSata/USB 2.0, 1.5TB, 2HD x 750GB External 1.5TB hard drive with eSATA and USB 2.0 connections Fastest possible data transfer with eSATA offering up to 3Gbps throughput; USB 2.0 offers 480 Mbps Built-in RAID options include RAID 0 for performance and RAID 1 for security 1-year limited warranty Device measures 6.4 x 6.1 x 7.9 inches (WxHxD)