SIIG Cool USB2.0/eSATA to SATA Docking Duplicator Station (SC-SA0G12-S1) Works as a standalone duplicator. No PC connection needed Dual-bay design allows duplication of two 2.5- or 3.5-inch (or mix) hard disk drives Supports both eSATA and Hi-Speed USB (USB 2.0) interfaces Built-in cooling fan effectively extends hard disk drive life Compliant with Serial ATA Rev. 2.6 Supports hot-plug, NCQ, and data transfer rate up to 3Gb/s Chipset: JMicron - JMB352