Key Benefits • Fast eSATA interface delivers better performance than FireWire 400, FireWire 800, and USB 2.0—transfer files to and from your drives in less time • Fits flush inside your computer's ExpressCard slot—may be left in the slot all the time • FIS-based port multiplier-aware, and works with enclosures with hardware RAID controllers—supports up to 5 disk drives • Supports Mac OS X, Windows 7 (Professional or Ultimate), Windows Vista (Enterprise or Ultimate), and Windows XP Pro RAID features eSATA Access to Fast External Storage Among FireWire 800, FireWire 400, USB 2.0 and eSATA, there's no doubt about which is the interface of choice when it comes to performance—eSATA delivers the fastest data transfers from storage devices with multiple interfaces(1). Sonnet's Tempo™ SATA Edge ExpressCard/34 provides fast eSATA connectivity through an adapter that practically disappears inside your computer. Mac & PC Compatibility For complete Mac and PC compatibility list, visit product's webpage.