Specifications
| function | range |
| Noise measurement (A-Weighted) | 30~130dB |
| resolution | 0.1dB |
| Precision | ±1.5dB |
| Sampling rate FASH | 125 milliseconds |
| Sampling rate SLOW | 1000 milliseconds |
| overload indication | OL |
| data retention | HOLD |
| Backlight | Yes. |
| Automatic shutdown | 5 minutes |
| Low power prompt | 3.0~3.5V |
| Battery | 4.5V |
| Current Consumption - Working | ≤40mA |
| Current consumption - shutdown | ≤10uA |
| Operating Environment | Temperature 0~40 ℃; Humidity ≤ 80% RH |
| Storage environment | Temperature -20 ℃~ 60 ℃; Humidity ≤ 75% RH |
| ON/OFF | Switch button: Short press once to turn on or off the product power. |
| MAX/MIN | MAX Maximum MIN Minimum measurement key: short press this key: cycle display in sequence; MAX/MIN/normal; measurement status. |
| FAST/SLOW | Sampling rate selection key: short press this key: 125 ms fast sampling and 1 second slow sampling selection. |
| HOLD/BL | Data hold/backlight key: short press: hold and release data; Changan: backlight on or off. |
Packing list
host X1, manual X1, certificate X1, warranty card X1
After-sales instructions
Warranty days: 365 days
[Note] For after-sales services outside the Chinese mainland, if the instrument requires repair, the shipping and possible associated taxes shall be borne by the sender. Generation address of the manual: http://en.nbchao.com/p/24141/Specification.html , which is only used by users who purchase commodities from the NBCHAO.