... level meterIt meets IEC 61672 standard, GB/T 3785,1-2010, and the second class sound level meter standard and individual ... conversion, wide dynamic range,GB/T 3785,1-2010, IEC61672,GB/T 15952LCD digital displayfrequency range: 20Hz-12.5kHz Modal TL5618B Microphone ... LA, Leq, Lmax, Lae, E, Tm (time of measuring)4 digits LCD digital displayPower 2 pieces of batteriesPower consumption:25mA more than ...