1UNIT DISPLAY: Press and hold the M key for 4s to light up all units, and the OZ unit will flash. Press the T key to select hide or display. Press and hold the M key for 4 seconds to return to the normal mode. 2ON OFF SETTING: Press and hold the T key for 4s in the power on state to display AU 60 (power off for 60s), press the M key to adjust the power off time, press the T key to confirm, enter the weighing state. 3CALIBRATION VALUE: Display 0.00 under power on status. Press and hold the ON OFF key for 2s, and then display -0-. Wait for 1s, and then display the weight value to be calibrated. After 3s, stop flashing, and calibration is complete. 4INCREASE DECREASE: You can press the unit conversion key to increase the value, and press the tare key to decrease the value. Equipped with 10G random weights, you can select the appropriate weight value for calibration. 5PROTECTION COVER: Hold the product, push the bottom cover at the OPEN position of the rear cover, take off the protection cover, and align the cover with the side of the weighing plate when covering it to avoid misalignment.