Find out why the check engine light is on by yourself! Read and clear diagnostic trouble codes (both generic and manufacturer specific), view freeze frame data, reset the Check Engine Light and view real-time sensor readings using your phone or tablet and an OBD2 App. | Access a whole new world of information about your vehicle directly on your phone, tablet or PC. View car performance, sensor data (Engine coolant & oil temperature, O2 Readings, Mass air flow, Speed, Fuel Trim, etc.), prepare smog test, monitor fuel economy, create your own dashboard, log your trips, and more to discover. | Works with cars, SUVs, light trucks and mini vans since year 1996 in the United States (all brands, including hybrid, light-duty diesel trucks, and some electric vehicles). Vehicles in other countries or regions that are OBD II compliant are also supported. Supports the five OBD-II protocols: CAN, KWP2000, ISO9141-2, J1850 VPW and J1850 PWM. | A third party App is required (some may require separate purchase). VARIOUS APPS AVAILABLE! Supports OBD Fusion, Car Scanner ELM OBD2, DashCommand, Carista etc for iOS and Torque Pro for Android. | Supports iOS & Android devices. It uses WiFi and does NOT have Bluetooth. Very useful and inexpensive tool for car owners to check their cars at home or on the go.