The Chassis Height Measuring System (CHMS) consists of four wireless modules, one for measuring each corner of the car, and a tablet with the CHMS app for taking measurements, saving data and bringing up past data to compare to your current live setup. The four modules can measure from 1.750" up to 10.500" with an accuracy of 0.015" or better, depending on conditions. No more laying on the ground with a tape measure, approximating your frame heights. Know all four of your heights, within three seconds of pressing a button with this quick, accurate and easy to use Chassis Height Measuring System (CHMS).