Digital display:                                               5 digits LCD.
Measuring level:                                         30~130 dBA,30~130 dBC.
Resolution:                                                      0.1dB. meter Digital display:                              5 digits LCD.
meter Measuring level:                            30~130 dBA,30~130 dBC.
meter Resolution:                                                  0.1dB.
Accuracy:                                              ±1.5 dB (under reference conditions) .
Frequency range:                                        31.5 Hz~ 8.5K Hz .
Linearity range:                                                        50 dB .
Frequency weighting:                                                        A, C .
Bar graph:                                        50 dB scale at 1 dB step for monitoring
current sound pressure level display .
Level ranges:                                                   30-80 dB; 50-100 dB;
                                                                           60-110 dB; 80-130 dB.
Time weighting:                                   Fast / Slow .
Microphone:                                      1/2 inch Electret Condenser microphone .
Max: Maximum hold .
Power supply:                   1*9V alkaline cells or DC 9V adapter < Power life: About 30 hrs >.
Self calibration time:                                             10 sec (every turn on) .
Dimensions:                                                              220×67×32mm .
Weight:                                                         approx. 210g(including battery).