Increase performance Thunderbolt technology is a revolutionary interface supporting high-resolution display and high-performance data devices through a single port. Allows you to take it with you everywhere you go Works with any portable GoFlex Drive or 2.5" SATA hard drives Upgrade your interface for faster file transfer performance Compatible with Thunderbolt displays and other devices Bus powered, no external power supply required 10 Gbps Thunderbolt port System Requirements: GoFlex Ultra-Portable Drive, Mac OS X operating system 10.6.8 or higher, Available Thunderbolt port & Thunderbolt cable Kit comes with: GoFlex Thunderbolt adapter (Note: Does not include Thunderbolt Cabl unless requested)