ELM327 USB Interface ELM327 USB Description: 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