Calibration sound source     

94dB@1KHz     

Measurement range     

30~130dBA、35~130dBC     

Accuracy     

±1.5dB（reference sound pressure      
standard，94dB@1KHz）

Frequency response     

31.5Hz~8.5KHz     

Resolution     

0.1dB     

Measuring level     

30 to 80 , 50 to 100, 60 to 110,     
80 to 130, 30 to 130

Dynamic range     

50dB/100dB     

Overload indication       

OVER / UNDER     

Frequency weighting characteristic     

A and C     

Digital display     

4 digits     

Analogy bar graph     

1dB/1 bar graph     

Sampling rate     

FAST:8times/second;SLOW:2times/second     

AC signal output     

4Vrms/ full bar graph, output impedance     
is about 600 ohm

PWM signal output     

Duty cycle =0.01X db value/3.3 x 100%      

Dyna mic cha racteristic        

FAST(high speed)/SLOW(low speed)     

Calendar accuracy     

±30seconds/day     

Data stor age quantity     

4700     

The m aximum value holding     

MAX     

Auto power off     

10 minutes without operation     

Micro phone     

1/2inch polarization capacitance microphone     

Power supply     

6V (4PCS 1.5V Alkline battery)     

Dimension     

70x35x256mm     

Weight     

244G (Without battery)     

Battery life     

20h continuous use(Alkaline batteries)