*This unit was designed according to following standards: 
----A. International electrician committee standard: IEC PUB 651 TYPE2 
----B. US national standard: ANSI S1.4 TYPE2

*Measuring range: 
----30~130 dBA

----35~130 dBC
*Accuracy: ±1.5 dB

*Digit & Resolution: 5位 & 0.1 dB

*Frequency response: 31.5Hz ~8.5KHz

*Measuring level: 30~130, 40~90, 50~100, 60~110, 80~130

* Frequency weighting characteristic: A & C

* Time weighting: FAST/SLOW

*Sampling rate: 2times/second

*Microphone：1/2 inch polarization capacitance microphone

*AC/DC output

*Max reading

*PWM output

*Calenda

*4700 data store

*USB computer interface

*Analysis software

*Overload indication: OVER / UNDER

*Automatic backlight

*Low battery indication

*Auto power off


*Packing method: PP box + Gift box
*Power: 1.5V AA* 4pcs (not included)
*Dimension: 256*70*35mm
*Weight: 308g (battery is not included)