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:This Audio DB Meter complies with IEC651 Type 2 and ANSI S1.4 Type 2, with the measuring scope from 30 to 130 dB and automatic shifting function, A and C Frequency Weighting mode selection and High speed(FAST)/Low speed(SLOW) response rate selection.The mini handheld digital sound level reader is compact, lightweight, and easy to use, it is not only extremely wear-resisting, but also elegant.The output of AC and DC analog signal can be connected to frequency analyzer or X-Y axles recorder for statistic analysis of data.Features with backlight feature, it is appropriate for gathering the sound data at night. And auto power off function is provided, high-reliability and well-designed high-efficiency power supply circuit make the battery more durable.Portable and easy to use, suitable for checking, monitoring or controlling the sound level for personal, families, business, studies, industrial, etc.Specifications:Material: ABS plasticAccuracy: 1.5 dB (based on the standard sound source, 94dB @ 1KHz)Frequency Response Range: 31.5Hz~8KHzDynamic State Range: 50dBMeasurement Range: 30~130dBA, 35~130dBCFrequency Weighting Character: A weight and C weightDynamic Characteristic of Sound Pressure: FAST 125ms, SLOW 1secMicrophone: 6mm capacitor microphoneDigital Display: 4-digit, resolution: 0.1 dB, sampling rate: 2 times/secDynamic Scale Display: 1 scale equals 2dB or 1dB, sampling frequency 2 times/secDynamic Scale Shift: 30~130dB, 30~80dB, 50~100dB, 80~130dBOverload Display: "UNDER" or "OVER" in display screenAC Signal Output: 0.65Vrms for each shift and full scale, the output of impedance around 600ohmDC Signal Output: 10mV/dB, the output of impedance around 100ohmPower Supply: 3 * 1.5V AAA battery (NOT included)Operating Temperature & Humidity: 040 / 32104 (10%80%RH)Storage Temperature & Humidity: -1060 / 14140 (10%70%RH)Item Size: Approx. 215 * 64 * 27mm / 8.46 * 2.52 * 1.07inItem Weight: Approx. 178g / 6.29ozPackage Weight: Approx. 336g / 11.87ozPackage Size: Approx. 23.3 * 18 * 5.5cm / 9.18 * 7.09 * 2.17inPackage List:1 * Sound Level Meter1 * User Manual (English)