Welcome to the store! 1. UNIT DISPLAY: Press and hold the M key for 4 seconds to turn on 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 normal mode. 2. ON OFF SETTING: Press and hold the T key for 4 seconds in the power-on state to display AU 60 (shutdown after 60 seconds), press the M key to adjust the shutdown time, press the T key to confirm, enter weighing. 3. CALIBRATION VALUE: Display 0.00 in the power-on state. Press and hold the ON OFF key for 2 seconds, then display -0-. Wait for 1 second and then display the weight value to be calibrated. After 3 seconds, it stops flashing and the calibration is complete. 4. INCREASE 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 choose the appropriate weight value for calibration. 5. PROTECTIVE COVER: Hold the product, press the bottom cover at the OPEN position of the back cover, remove the protective cover, and align the cover with the side of the weighing plate when covering it to avoid misalignment. Item Type: Digital Dynamometer Material: ABS Battery Type: Button Battery (Battery Included) Battery Model: LR44 Battery Capacity: 160mAh Number of Batteries: 4PCS (2 batteries actually required) 6 Unit Selection: G, oz, ozt, TL, ct, gn Weight: Approx. 106g / 3.7oz 1 x Dynamometer 1 x Leather Case 1 x Weight 4 x Button Battery 1 x English User Manual Your satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!