Sound Decibel Meter Type 2 Digital sound level meter with calibration certificate Reliable meter for measuring loudness, sound and noise levels from environmental and mechanical sources Measurement Sound Level Operating range from 35dB 130dBdecibel Applicable standard EN 61672 type2 Sound Level Meter Noise measurement device for application applications include Environmental and machines noise tester, warehouses, factories, office buildings, restaurants, schools, classrooms, library, hospitals, art galleries, stadiums, building security Accurate and Reliable 12 inch electret condenser microphone, Accuracy 1.8dB ref 94dB1KHz and 0.1dB resolution Comprehensive Support Peace of Mind Your purchase includes both technical support and a 2year warranty. Were here for you via phone and email through Amazon Messages, and youll find a user manual for added convenience