The car diagnostic tool market has long been littered with copycat products with questionable quality and performance. One of the most popular and often copied PC-to-OBD diagnostic interface is the ELM327 command protocol. About 80% of the ELM327 interface adapters today are either bad clones or counterfeits. The OHP ELMconfig OBDII USB scan tool is not one of them, and here are the qualities that would differentiate the OHP ELM327 interface USB device from the pretenders.