Decibel Data Logger The digital decibel meter can record 32000 groups data; the data logging function is compatible with Windows 10; 8; 7; Vista and XP High Accuracy Wide Measuring range 30130dB; Accuracy 1.5dB; Frequency response 31.58.5KHz; Fast and Slow time weighting selection; display update time 2 timessecond FAST; 1 timesecond SLOW AC and DC Output AC signal output 4Vrms full barograph; output impedance is approx; 600 ohm; DC signal output 33mVdB Bar Graph Display The LCD digital display can shows a 3 digit decibel level values; Auto Ranging Bar graph level; time and date Wide Applications The decibel meter is handheld design and easy to carry; widely use for office; classroom; noisy neighbour; environmental measurement etc