The WW43 features a multiple sealed load cell system for best accuracy over time. Accuracy is microprocessor-controlled for precision performance and reliability. Records start weight, calculates goal weight, tracks last weight, and displays the difference between start, last, goal and current weight for 4 users. Leveler feature keeps user from "cheating" by shifting weight. Elegant glass design fits any décor. Includes long life 3V lithium battery.