Feature●Application: Widely used in outdoor activities, RV, yacht, cam, etc.●The reverse magnetic steel, pointing in the direction in which the car is heading, convenient for drivers observation and habits.●High Precision: Users can correct the deviation of the with the included calibration tools, ensures high accuracy.●Users can correct the deviation of the with the included calibration tools, ensures high accuracy.●Easy to Install: The installation is simple and does not require complicated operations, save time and effort.Description