SIIG's long-term business vision, comprehensive product line, effective marketing strategy and exceptional customer support have made SIIG the leading brand for computer add-on products. High-quality control standards are evident by one of the lowest defective return rates in the industry. PRODUCT FEATURES: Easily add SATA II connectivity, speed & security to your computer with external Serial ATA drive connections; Adds two eSATA (external Serial ATA) ports; Supports RAID 0 (stripe) for performance and RAID 1 (mirror) for data reliability; Supports data transfer speeds up to 3.0 Gbps (300MBps); Supports Native Command Queuing (NCQ) and SATA TCQ commands.