Decibel Meter,Noise Meter/Sound Level Meter Tester Range 30-130dB (A) with LCD Display (Batteries included) Compact and lightweight, come with a portable carrying case, convenient to take it out for testing Frequency range: 31.5Hz to5KHz,Accuracy: among 1.5dB,Sample rate: 2 times/second Digital display: 4digits,Resolution: 0.1dB Sample rate: 2 times/second,Operating condition: 0-40degree 10-80%RH Microphone: 1/2 inch electret condenser microphone,Storage condition: -10--+60degree 10-70%RH