*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
*Accuracy: ±1.5 dB

*Digit & Resolution: 4 digits & 0.1 dB

*Frequency response: 31.5Hz ~8.5KHz

* Frequency weighting characteristic: A

*Sampling rate: 2times/second

*Microphone：1/2 inch polarization capacitance microphone

*Max reading

*Automatic backlight

*Low battery indication

*Automatic power off


*Packing method: Blister + Card
*Power: 9V battery (6F22)

*Dimension: 57*36*149mm
*Weight: 144g (including battery)