1.Comply with standard IEC 61672-1:2002 Class 2 2.Frequency Range:20Hz~12.5KHz 3.Wide dynamic ... -15 °C to 50 °C Complies with IEC 61672 Class 2 USESWidely use in Industrial Noise Surveys ; machinery, vehicles, ships ... 5m, 10 m, 20 m, 30 m, 1 h, 2 h, 4 h, 8 h, 12 h, 16 h,24h ... m, 10 m, 20 m, 30 m, 1 h, 2 h, 4 h, 8 h, 12 h, 16 h, ... °C—20°C~ 50°C—10°C~ 50°C Integrating Sound Level Meter AWA 5636 Class 2