Instructions for using [Clear current amount] Press "RESET" to clear current amount.[Switch total and batch-total] Press "CAL" to switch between "TOTAL" and "RESET TOTAL".[Clear batch-total] Press "RESET" and hold 3 seconds utils "CLEAN" displays on the screen, press "CAL" to clear while press "RESET" to cancel.[Modify calibrations] Press "CAL" and hold 3 seconds, press "RESET" 4 times, press "CAL" to change calibration, wait for 3 seconds to exit automatically.(Support for Liters, Gallons, Pints, Quarts)