Right Weigh's 202-DDG-01 interior digital load scale is designed for monitoring one height control valve (HCV). This is typically for installation on a truck monitoring a single height control valve drive axle group. The gauge also has the option of calculating an estimated steer weight based on the drive weight. After both an empty and loaded calibration has been performed at a certified ground scale, the gauge will reliably display the on-the-ground axle group weight in pounds or kilograms as well as connect to the Right Weigh app to view weights. When properly calibrated and used, Right Weigh's on-board load scales are the most valuable tool available for maintaining safe and legal axle weights. Corresponding Installation Kit: 101-SK