AC Adapter: No Material: Aluminum Dimensions: 129mmx79.9mmx13mm Internal Interface: SATA Maximum Capacity (per Bay): Up to 500GB Features: Hi-Speed USB 2.0 compliant and USB 1.1 backwards compatible Easy Plug and Play installation Ultra-Portability OneTouch Auto-Backup function Powered via the USB port. No external power or battery needed LED indicates power on and data access Operating Systems Supported: Windows 2000, Windows XP, Windows Vista, Windows 7, Mac OS 9.0 or later, Linux Kernel 2.4 or later Parts: 2 years limited