... .1dBSampling Frequency2 times/secSpecification* This unit was designed according to following standards----A. International electrician committee standard: IEC PUB ... 5 & 0.1 dBFeatures*Frequency response: 31.5Hz ~8.5KHz*Measuring level: 30~130, 40~90, 50~100, 60~110, 80~ ... us Reduce waste, Let usprotect the environment together! Thanks! High quality GM1357 Digital Sound Level Meter Decibel Logger Tester ...