| Functions | Range | Resolution | Accuracy | 
| Noise (A Weighting) | 30~130dB | 0.1dB | ±1.5dB | 
| Sampling Rate | FASH | 
 | 125ms | 
| SLOW | 
 | 1000ms | |
| Overload Indication | 
 | 
 | OL | 
| MAX/MIN | 
 | 
 | MAX/MIN | 
| Data Hold | 
 | 
 | HOLD | 
| LCD Backlight | 
 | 
 | Yes | 
| Auto Power Off | 
 | 
 | 5min | 
| Low Battery Indication | 
 | 
 | 3.0~3.5V | 
| Battery | 
 | 
 | 4.5V | 
| Current Consumption | Working | mA | ≤40mA | 
| Power off | uA | ≤10uA | |
| Working Environment | Temperature | 
 | 0~40℃ | 
| Humidity | 
 | ≤80%RH | |
| Storage Environment | Temperature | 
 | -20~60℃ | 
| Humidity | 
 | ≤75%RH | |
| Key Functions | |||
| ON/OFF | Short press to turn on/off the meter | ||
| MAX/MIN | Short press to switch between MAX/MIN/normal measurement state | ||
| FAST/SLOW | Short press to select fast sampling (125ms) or slow sampling (1s) | ||
| HOLD/BL | Short press to enter data hold mode, long press to turn on/off backlight | ||