Read Codes:This option is used to identify which section of the emission control system has malfunctioned.  Erase Codes:After reading the retrieved codes from the vehicle and certain repairs have been carried out, you can use this function to erase the codes from the vehicle.  Live Data:This option retrieves and displays live data and parameters from the vehicle's ECU.  View Freeze Frame:When an emission-related fault occurs, certain vehicle conditions are recorded by the on-board computer.  O2 Monitor Test:The results of the O2 sensor test are not live values but instead the results of the ECU' s last O2 sensor test, for live O2 sensor readings. NOTES: A.Before performing this function, make sure to retrieve and record the trouble codes. B.After clearing, you should retrieve trouble codes once more or turn the ignition on and retrieve codes again. If there are still some trouble codes in the system, please troubleshoot the code using a factory diagnosis guide, then clear the code and recheck. C.If DTC were erased, Freeze Data may not be stored in vehicle memory depending on the vehicle. Specifications: Brand: Model:KW460 Color: black Material:ABS Display: TFT color display (320 x 240 dpi) Operating Temperature: 0 to 60°C (32 to 140 F° ) Storage Temperature: -20 to 70°C (-4 to 158 F° ) External Power : 8.0 to 18.0V power provided via vehicle battery Inspection vehicle: OBD2 + EOBD + Benz full system Screen: 2.8 inches colorful screen Language: Chinese,English,German Package size: 25.5 * 18.5 * 7cm Package weight: 710g Package List: 1 * Tester 1 * Polyester Bag 1 * Cable Clip 1 * USB Cable 1 * User Manual