Want to test the sound level? Need to know the noise level? Try our digital sound level meter. It's featured with wide measuring range (30-130dB). It's portable and easy to use as a handy instrument for sound quality control in factory, office, home, school and construction site.Features:2.7" large LCD display for easy reading, convenient to use.Wide measurement range from 30dB to 130dB, Frequency: 31.5Hz - 8KHz, Resolution: 0.1dB, Accuracy: 1.5dB.With A and C equivalent weighted sound pressure levels.Fast and slow dynamic characteristic mode.AC and DC signal output for frequency analyzer level recorder, FFT analyzer, graphic recorder, etc.With maximum/minimum value measurement.90-130dB alarm level setup range, it will hold the maximum value once the measured level is large than the alarm setup level.Low battery indication, automatic & manual power off function.Equipped with sponge ball and a storage pouch. Compact and light, convenient to hold and carry.Portable and easy to use, suitable for checking, monitoring or controlling the sound level for personal, families, business, studies, industrial, etc.Specifications:Material: ABSAccuracy: 1.5dB (at the calibration point, 94dB@1KHz)Frequency Response: 31.5Hz~8.5kHzDynamic Range: 50dBMeasure Range: 30~130dBA, 35~130dBCFrequency Weighting: A weighted and C weightingDigital Display: 4 digitResolution: 0.1dBSampling Speed: 2 time per secondAnalog Bar Graph: One bar is 1dB, sample rate is two times per secondOverload Alert: OVER or UNDER icon to show the stageAC Signal Output: 0.707V rms at FS, output impedance approx. 600ohmDC Signal Output: 10mV/dB, output impedance approx. 100ohmTime Weighting: Fast/SlowMicrophone: 1/2 inch ECM type microphoneOperating Temperature & Humidity: 040, 10%80%RHStorage Temperature: 1060, 10%70%RHPower Supply(NOT included): 1 * 9V 6F22 battery or 9V 100mA DC adapterLCD Size: 52 * 43mm / 2.05 * 2.01inItem Size: 221 * 66 * 32.5mm / 8.70 * 2.60 * 1.28inItem Weight: 200g / 7.06ozPackage Weight: 261g / 9.23ozPackage Size: 24.5 * 9.2 * 5.2cm / 9.65 * 3.62 * 2.05inPackage List:1 * Sound Level Meter1 * Storage Pouch1 * User Manual(English)Note:When measuring the noise in outdoors, please put a sponge ball on the microphone head to prevent the microphone from being blown directly to cause airflow noise.