MESTEK SL620 Decibel Meter Audio Level Meter Logger 30-135dB Noise Measurement Sound Level Meter Detector Diagnostic Too

Features Model SL620 digital sound level meterNoise measurement range 35 135dBNoise accuracy 2 0dB reference sound pressure level 94dB 1kHz Frequency response 31 5Hz 8kHzTime weighting F S switching FAST use 125ms time constant default use SLOW use 1 second time constant used when the tone value changes greatly Frequency weighting characteristics A characteristic A weight Digital display 4 digit LCD displayResolution 01dBMeasuring two gears Low file less than 100dB High file greater than 100dBData retention haveMAX MIN YES large and small value measurements Ambient temperature measurement 0 60C degree celsius Use battery 1 5V AAA 3 7 batttery not include Working temperature and humidity 0 40C 10 80 RHStorage temperature and humidity 10 60C 10 70RHDimensions 147 59 30mmWeight about 76gPackage included 1 x SL620 digital sound level meterDetails Pictures