The sound level meter measures and displays sound levels in dB from 30 to 130 dB. User selectable features include Frequency weighting (A & C), Response Time (Fast & Slow), Data Hold and MAX/MIN recording. Comply with norm of IEC 651 type 2, ANSI S1.4 TYPE 2. Each meter is fully tested and calibrated in factory before delivery. With proper use, it will provide years of reliable service

Features:     
              
               Digital LCD with Analog Bar-graph and backlight
               A/C Frequency weighting
               Fast/Slow Response time
               Over-range and Under-range indication
               MAX/MIN
               Data Hold
               Auto Power Off
               DC/AC Analog signal output
               External 9V DC power supply
               Data logging and USB interface

Specifications:
              Applicable standards:IEC61672-1: 2003 Class 2
              Measurement range:30 to 130dB
              Microphone:1/2 inch polarized condenser microphone
              Frequency range:31.5~8000Hz
              Accuracy:±1.5dB
              Resolution:0.1dB
              Data update:500ms
              Response time: FAST 125 ms, SLOW 1 s
              Standard calibrator:1KHz sine wave @ 94 ors 114dB
              Display:3-1/2 digital LCD with analog bar-graph
              Outputs: AC/DC signal output from the earphone jack
               AC=1Vrms ,DC=10mV/dB
               Output port: Micro USB 
              Power: One 9V battery or DC 9V
              Data logger Memory: 32000 data 
              Operating condition: 0 ~ 50°C (32 ~ 122°F),10 ~ 90% RH,Non-condensing
              Storage condition: -20 ~ 60oC (- 4 ~ 140°F),10 ~ 90% RH,Non-condensing
              Weight: 200g
              Dimension: 215mm*58mm*33mm
              Accessories: Manual, 9V battery, windscreen, screwdriver, giftbox package, USB cable, Software CD.