Feature 1、UNIT 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. 2、ON 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. 3、CALIBRATION 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. 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 select the appropriate weight value for calibration. 5、PROTECTION 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. Item Type: Digital Dynamometer Material: ABS Battery Type: Button Battery (included battery) Battery Model: LR44 Battery Capacity: 160mAh Battery Number: 4PCS (2 batteries are actually required) 6 Units Selection: G, oz, ozt, TL, ct, gn Weight: Approx. 106g / 3.7oz Package List 1 x Dynamometer 1 x Leather Case 1 x Weight 4 x Button Battery 1 x English User Manual Note 1. Please use this product in a stable, vibration free and wind free environment, 2. Please do not place any object larger than the rated weight on the tray, which may damage the sensor. Do not impact the weighing tray when placing the object, and handle it with care. 3. When using this product, do not use mobile phones within 30cm around the scale body, which may affect the use of this product. 4. The correct reading is read when the display value is stable. 5. When the battery sign is displayed on the display screen, please replace the battery immediately, and take out the battery if it is not used for a long time. 6. Please use this product in an environment of 10‑30℃. Excessive temperature difference may cause measurement error. If the temperature difference is too large, please use standard weights to calibrate the original product before use. During calibration, it must be ensured that this product is in the same environment for more than 30 minutes. 7. The FULL sign will appear when the weight added to the tray exceeds the rated weight.