Features: 100% brand new and high quality It is used to back up important data to the industrial computer / embedded system. Only one CH375DOS.Sys driver file is needed, the length is less than 5K, and only 4K is required after loading. Support hot swappable U disk, easy to use, U disk can only be plugged in when needed. Supports DOS versions from 3, x to 7, x, compatible with WINDOWS3.X, WINDOWS 95/98 / ME and other operating systems. Supports all file systems supported by the operating system. For example, DOS 7.X can support FAT12 / FAT16 / FAT32. The controller only works when the application program reads and writes the U disk, and it does not affect the operation of the original DOS system and industrial control computer when it is idle. Used for non-real-time data exchange between computer and industrial computer / embedded system. Using the universal U disk in the market, it is easier to buy than flash memory and electronic disk, and the capacity is not limited. Package Includes: 1PC x ISA to USB Card 1PC x CD Specifications: Material: ABS Size: 12x7x1cm/4.72x2.76x0.39in note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! It is used to back up important data to the industrial computer / embedded system. Only one CH375DOS.Sys driver file is needed, the length is less than 5K, and only 4K is required after loading. Support hot swappable U disk, easy to use, U disk can only be plugged in when needed. Supports DOS versions from 3, x to 7, x, compatible with WINDOWS3.X, WINDOWS 95/98 / ME and other operating systems. Supports all file systems supported by the operating system. For example, DOS 7.X can support FAT12 / FAT16 / FAT32.