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. Colour: green Material: PCB board + plastic + metal Package Contents: 4 x ISA to USB Adapter Board Note: Different batches, the appearance of the product may be different from the picture, which does not affect the use Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.