... time setting, top riding speed setting, metric system/English system setting(MPH and Km/H,Mile and Km),wheel size setting(18—28inch),LCD ... riding distance, 6Km/h power assist walk, and malfunction code of the electronic control system. J—LCD is equipped with special 30 ... this function during riding. Turn On and Turn Off the Backlight Hold both UP and MODE for 3 seconds and turn on the J—LCD backlight ...