... , easy to use and handy instrument for sound quality control in office, home, school and construction site. Features:100 ... TYPE 2 & ANSI S1.4 TYPE 2 for sound level metersInstantaneous sound measure functionWide measuring range 40~130dB (decibels ... Slow dynamic characteristics modes AC Signed Output for frequency analyzer level recorder, FFT analyzer, graphic recorder, etc. SpecificationsAccuracy: ±2dB ...