CEM DT-8850 Sound Level Measuring Meter

CEM DT-8850 Sound Level Measuring Meter, Built-in Check Calibration, Frequency Range 31.5 Hz ~ 8 kHz, Measurement Range 35dB ~ 130dB, 4 Liquid Crystal Display, Resolution 0.1dB, Time Weighted Fast Response (125 ms), Slow Response (1 sec.), Dynamic Range 65dB, Battery Life  At least 50 Hours (alkaline), Operating Temperature 0 ~ 40 Degrees Celsius, Operating Humidity 10 ~ 90% RH, Weight 255g.