Sound Level Meter 30 to 130 dB dB Range Frequency Range 31.5 Hz to 16 kHz A or C Frequency Weighting Accuracy Depends on Frequency Resolution 0.1 dB Display 2.05 x 1.5 in LCD 200 ms or 500 ms Response Time SD Card Interface Standards IEC 61672 Class 1 Criteria Levels 94 dB Records Up To Unlimited Data Points Built-In Calibration Pot Output Jack RS-232 Includes 2 GB SD Card Case Integral 0.5 in Microphone User s Manual No Calibration Certificate