1.Max Hold and Data Hold Function2.Level Range:Low=30-100dB ,High=60-130dB3.Accuracy :+1.5dB (ref 94dB @1kHz)4.Frequency Range:31.5Hz to 8k Hz5.Frequency Weighting: A,C6.Time Weighting: Fast ,slow7.Operation temperature:0 to 40°C(32 to 104oF)8.Operation humidity:10 to 90%RH9.Storage temperature: -10 to 60°C( 14 to 140 oF)10.Storage humidity:10 to 75%RH11.Auto power off

small digital Sound level meter PCI-850