ZHOL  ELM327 Bluetooth OBD2 Diagnostic Code Scanner - Scan Tool Check Engine Light CAR Code Reader - Android Compatible AccuRave Powerful Bluetooth ELM327 is the newly developed wireless scan tool. It works on all OBD-II protocols Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning in real time (over 3000 generic code definitions in the database). Professional Results at a great price. Find out why your check engine light is on before visiting the mechanic; save money by fixing simple problems yourself Clear trouble codes and turn off the MIL ("Check Engine" light) and more. Compatible with Android phones Wireless Bluetooth connection to your computer. No More Wires!