OBD Innovations0174; Mini ELM327 Bluetooth OBD2 Car Diagnostics Scanner with Power Switch for Android ON/OFF Power Switch that allows you to keep it plugged in at all times CLEAR engine codes and check engine lights Connect to an Android Smartphone using one of the many free compatible apps or a Bluetooth enabled computer using the supplied software View real-time vehicle data while driving and Find and fix problems before they happen Sold and shipped only by authorized OBD Innovations&#0174; dealers. Beware of cheap clones