Fast and slow dynamic characteristic modes and DC signed output for analyzer level recorder, FFT analyzer, chart recorder, etc. Measure sound pressure level and are commonly used in noise pollution studies for quantification of almost any noise, but especially for industrial, environmental and aircraft engineers. Safety,industrial security offices and sound quality control in various environments. Measurement range: 30-130Decibel.with Two weighted sound pressure levels..A and C The Decibel meter is convenient to use and read at night with a large LCD backlight display. This unit has been designed according to IEC651 TYPE2 & ANSI S1.4 Type2 for sound levels. Sound measurement function Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin