1.Critical Functionality: Quickly reads and clears stored emissionsrelated codes, pending codes, and displays code definitions. Turns off the MIL (check engine light), helps reset the monitor before you take the car to smog, and lets you know what's going on before you take the car in for repairs. 2.Enhanced Diagnostics: Supports O2 sensor and EVAP (evaporative control) system test. The code scanner can be used to initiate a leak test of a vehicle's EVAP system by monitoring the integrity of the fuel tank system. The O2 sensor test is used to monitor and adjust the air/fuel mixture. 3.Display UI: It features a 2.4' TFT true color display (262K) LCD for clear viewing of test results. With the clear design UI, users can easily access setup, OBDII diagnostics, I/M readiness and DTC search and check. 4.Diagnostic Reports: The Review Print option allows you to save or print diagnostic reports as needed. It lifetime software updates for this unit to fix the latest bugs or add parameters.