2.0 Specification: 2.1 USB Version 1.1/2.0 interface Capacity from 256MB to 16GB Auto-run Function is optional Bootable Function Built-in Password Protection 2.2 High Performance Data transfer rate up to 33MB/s for Read, 22MB/s for Write in Dual-channel mode; Data transfer rate up to 20MB/s for Read, 9MB/s for Write in Single-channel mode ***The rate of performance depends on the different operation system available and various flash adopted*** 2.3 Multiple Operation Systems supported No driver needed in Windows ME, Windows 2000, Windows XP, Mac 9.x or later, Linux Kernel 2.4 or later. Only Windows 98 and Windows 98SE need the enclosed driver 2.4 10 years data retention;More than 1,000,000 times data encryption 2.5 Product Dimension: 5.9*1.68*0.77cmH;Net weight :0.01 KG