Multi-Function- Handy multi-function OBD2 code reader with built-in OBD2 DTC lookup library, which helps you determine the cause of check engine light, read code, clear code, view freeze frame, I/M, information vehicle temperature, data stream, real-time curve, get vehicle speed information, calculate load value, engine coolant temperature LCD display- Designed with LCD display clear - White backlight and contrast adjustment. No battery or charger required, the OBD reader receives power directly from your vehicle via the OBDII data link connector Compact Design- the car diagnostic scanner is equipped with a cable, made of extra thick flexible insulation. There are 6 buttons on the OBD2 scanner: scroll up/down, enter/exit, and buttons that quickly determine vehicle VIN number and DTC fault code Note: Data is manual measurements, please allow 1-22cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.