MAIZI ELM327 V2.1 Scanner Software USB Plastic PC-based Diagnostic Scan Tool With FT232RL Chip ELM327 is the latest PC-based scan tool.It supports all OBD-II protocols and is dispatched with a number of compatible programs The processor is an ELM327. The output protocol (connection to laptop) is USB cable The program is very easy to install, It is easy to use and very useful to diagnose cars Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning (over 3000 generic code definitions in the database) OBD-II Software for ELM327 is a free program that allows you to use your PC and a hardware interface to get the information from your car's computer