Mastech Digital sound level meter MS6700 30 dB - 130 dB
FEATURESLCD digital displayAnolog bar indicatorWide dynamic rangeAuto/Manual rangeFast/Slow response selectableMAX value hold functionA/C weighting selectionDate and time displayAC/DC auxilitary outputBack lightLow power indication SPECIFICATIONSMeasurement range 30dB ~ 130dBAccuracy  2dBResolution  0.1dBDisplay  3 1/2 digitalsSample rate  2 times/sFrequency range  30Hz ~ 8kHzOver range indication  "UNDER" or "OVER"Low power indicationAuxilitary output AC 0.707Vrms at full range for each level,impedance 600ΩDC 10mV/dB, impedance 100ΩBattary voltage 6 x 1.5V