1. Please do not use it in high temperature or humid places.

2. Please remove the battery if not used for a long time to avoid electrolyte leakage and damage to the instrument.

3. The automatic gear (30-130dB) is not suitable for measuring instantaneous impact noise.

4. When measuring sound levels outdoors, please install a windproof ball on the microphone head to prevent the microphone from being directly blown by the wind and causing airflow noise.

5. To ensure the accuracy of measurement, calibration is required. Fit the sound level calibrator to the microphone, turn on the calibration power, read the value, adjust the noise meter sensitivity potentiometer, and complete the calibration.