Fancy exterior, security, multi-functions, and higher transmission speed or higher capacity Available Capacities: 16MB,32MB,64MB, 128MB, 256MB,512MB, 1GB, 2GB, 4gb Hi-Speed USB 2.0 Certified Compatible With USB 1.1 For Mac and PC, No Driver Req.* No External Power Required Functions as Hard Drive LED Indicates Power, Read/Write Automatic system detection as a removable disk. Shock Resistance: 1000G Min. Data Retention: 10 Years 3 Year Warranty