These devices use ELM327 technology to interface with your vehicle's OBD-II system, but they don't have any built-in software, display, or anything else that a traditional code reader has.
Ngwaọrụ ndị a na-eji nkà na ụzụ ELM327 na ịnweta usoro OBD-II nke ụgbọala gị, ma ha enweghị ihe ngwugwu ọ bụla wuru, ngosipụta, ma ọ bụ ihe ọ bụla ọzọ nke onye na-agụ akwụkwọ ọdịnala nwere.