Features Exceptional Precision Dive into acoustic analysis with an impressive ±1 5dB accuracy Based on a standard sound source 94dB 1KHz the FDM01 ensures that you re armed with the most accurate readings possible whether in a silent library or a bustling city center Broad Frequency and Dynamic Range Catering to a wide range of audible frequencies from 31 5Hz to 8 5KHz and a dynamic measuring scope of 30 130dB this device is adaptable to diverse environments and applications Real Time Digital Display Get instantaneous readings with a high resolution digital display showing results at a sampling rate of 2 times per second Each scale represents 2dB ensuring clarity in every measurement Versatile Dynamic Characteristics Whether capturing sudden sharp noises or monitoring prolonged ambient sounds the FAST fast and SLOW slow response speeds make this meter incredibly versatile Additionally the device provides clear overload indications with OVER and UNDER symbols making it foolproof Durable and Long Lasting Equipped with a 600Mah 3 7V lithium battery and a sturdy 6mm condenser microphone the FDM01 is designed to last Whether in freezing temperatures or tropical humidity this tool promises performance without compromise Specifications Brand FNIRSIModel FDM01Accuracy ±1 5dB 94dB 1KHz standard sound source Frequency Range 31 5Hz 8 5KHzDynamic Range 30 130dBDisplay 4 digits resolution 0 1dBSampling Rate 2 times secondMicrophone 6mm condenser m