Item No.: C25A010
.This unit was designed according to following standards:
.A. International electrician committee standard: IEC PUB 651
.TYPE2  B. US national standard: ANSI S1.4 TYPE2.
.Measuring level:40-130 db A
.Accuracy:+/-1.5db(under reference conditions)
.Frequency range:31.5Hz to 8.5k hz
.Linearity range:50dB
.Frequency weighting characteristic: A .
.Digital display:5 digits
.Resolution:0.1db
.Display:0.5 secretary
.Over indicate over range:Under indicate less than limit of the range Time weighting
.fast/slowMicrophone:1/2 inch electret condenser microphoneMax:maximum hold,min
.holdPower supply:9V 6F22battery
.Self calibration time:10 sec(every turn on)
.Operating temperature:0℃to40℃Operating humidity:10%to80%RH
.Storage temperature:-10℃to60℃
.Storage humidity:10%to70%RH
.Dimensions:150(L)*53(W)*31(H)mm
.Weight:158g(including batteries)