1、Quality ABS material makes the meter firm, antiwear and durable for long time using. 2、Handheld design and lightweight styling, which is convenient to use and carry. 3、 LCD display screen, it has high definition, which is convenient to read data. 4、High sensitivity, it has no false alarm, the measuring range is from 30-130dBA, it will provide an most accurate data for you. 5、Suitable for various occasions, suitable for sound quality control in factory, office, home, school and construction site, etc. Features: 1. Quality ABS material makes the meter firm, antiwear and durable for long time using. 2. Handheld design and lightweight styling, which is convenient to use and carry. 3. LCD display screen, it has high definition, which is convenient to read data. 4. High sensitivity, it has no false alarm,  the measuring range is from 30-130dBA, it will provide an most accurate data for you. 5. Suitable for various occasions, suitable for sound quality control in factory, office, home, school and construction site, etc. Specification: Condition: 100% Brand New Material: ABS Measuring Range: 30-130dBA Accuracy: ±1.5dB (at reference sound pressure level, 94dB, 1khz >) Frequency Response: 31.5hz-8.5khz measurement: 30-80,50-100.60-110,80-130, 30-130db Dynamic range: 50dB/100dB Frequency Weighted Characteristics: A and C Digital Display: 4 digits Resolution: 0.1db Sampling rate: 2 times/second Analog characterization Show: One characterization represents 1dB and the sampling rate is 2 times/second Overload Indicate: the OVER/UNDER symbol AC Dial Number Output: 0.707Vrm s/ full scale, output impedance of about 600 ohm DC Double Output: 10m V/dB, Output Impedance: About 100 ohm Dynamic Characteristics: the reaction rate is FAST and SLOW Microphone: 1/2 inch capacitive microphone Maximum locked: M Ax Power Source: 9V Baatery (Include) Battery Life: About 30 hours Starting Self-check Time: 3 seconds Working Temperature and Humidity: 0-40°C, 10-80% RH Storage Condition Temperature and Humidity: -10-60°C (14 -140 °F), 10~70%RH Size: Approx. 149 x 57mm/5.9 x 2.2in Package List: 1 x Sound Level Meter 1 x Instruction Book