Right Weigh's 201-EBT-01B Exterior Digital load scale is designed for drive or trailer suspensions with one height control valve. 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. If desired, this scale can be programmed with up to 4 calibration sets for different axle configurations, or can be used in estimated steer mode when installed on a drive axle, which will give both the drive axle weight, and an estimated steer axle weight. 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: 201-SK (Covers the installation from the back of the load scale to an axle group's air suspension system) Download our free app and try it out! App available for both Android and iOS.