1.Sound level Range:30 to 130dB(Low=30-100dB ,High=60-130dB)

2.Accuracy :+1.5dB (ref 94dB @1kHz)

3.Frequency Range:31.5Hz to 8kHz

4.Frequency Weighting: A,C

5.Max Hold and Data Hold Function

6.Time Weighting: Fast ,slow

7.Operation temperature:0 to 50C(32 to 122F)

8.Operation humidity:10 to 90%RH

9.Storage temperature: -10 to 60C(14 to 140F)

10.Storage humidity:10 to 75%RH

11.Backlight,Auto power off and  Disable sleep mode

12.Over range ,Low range, low power symbol display

with gift box

  if the quantity above 500pcs,we will provide OEM servcie freely.