Features:1. Handheld design and portable styling, which is convenient to use and carry.2. High sensitivity, which has no false alarm, the measuring range is from 30-130dBA, it will provide an most accurate data for you.3. LCD display screen, it has high definition, which is convenient to read data.4. Multifunctional style, which can meet different needs, convenient for using.5. Suitable for various occasions, suitable for sound quality control in factory, office, home, school and construction site, etc.Specification:Condition: 100% Brand NewMaterial: ABSAccuracy: ±1.5dBMeasuring range: 30-130dBAFrequency weighting: A and C.Time Weighting: Fast Speed and Slow SpeedOperating Environment Conditions: The height is below 2000 metersMeasurement Grade: 30-130dB (A), 35-130dB (C)Grade Range:30 to 80 decibels50 to 100 decibels60 to 110 decibels80 to 130 decibels30 to 130 decibelsAccuracy: ± 1.5db (under reference conditions)Resolution: 0.1dbFrequency Range: 31.5hz - 8.5khzLinear Range: 50dB / 100dBBar Chart: Steps 50dB scale with 1dB for monitoring current sound pressure levelSampling Rate: 20 times/secondNumber Display: 4 digitsAC Signal Output: FS output impedance is about 0.707Vrms.600 Ω (ohm)DC Signal Output: 10mV/dB, about output impedance.100 Ω (ohm)Time Weight: Fast/slowMicrophone: 1/2in electronic capacitor microphoneMaximum Holding Function: YesWorking Conditions: 0-40°C, Relative Humidity 10- 80%Storage Conditions: -10-60℃, 10- 70% RHPower Supply: 4x AA 1.5v battery (Not Included)Size: Approx. 256 x 70mm/10.1 x 2.8inPackage List:1 x Sound Level Meter1 x USB1 x Connecting Line 1 x Instruction Book