OBD-II Software for ELM327 USB is a free program that allows you to use your PC and a hardware interface to get the information from your car"s computer. * The program is very user-friendly, and easy to learn. It is also very easy to install * Simply extract the files into a folder on your computer"s hard drive, and you"re ready to go. * To uninstall the program, simply delete the entire contents of the folder where the program resides. * The software supports two platforms - DOS and Windows.