Item No.: C25A022
.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 range: 30~130 dBA；35~130 Dbc.  
.Accuracy: ±1.5 dB.  
.Digit & Resolution: 5digits & 0.1 dB.  
.Frequency response: 31.5Hz ~8.5KHz. 
.Measuring level: 30~130, 40~90, 50~100, 60~110, 80~130.  
.Frequency weighting characteristic: A & C.  
.Time weighting: FAST/SLOW.  
.Sampling rate: 2times/second.  
.Microphone: 1/2 inch polarization capacitance microphone.  
.AC/DC/PWM signal output.  
.Max reading.  
.Barcode indicate the value.  
.Overload indication: OVER / UNDER.  
.Data store up to 4700.  
.USB connection, calender function.  
.Low battery indication.  
.Power: 1.5V AA* 4pcs.