Feature:Specification:This noise meter is designed to test sound level in various environment. It is widely used in noise control engineering, quality control, health and treatment, home environment monitoring, etc.Features: This instrument is high precision sound level meter, accuracy up to 1.5dB.Temperature measurement function and Temperature unit selection(/)Red back light alarm and sound alarm function.This digital sound level meter with stable and reliable performance.Wide measurement range from 30dB to 130dBA.Data hold function, maximum and minimum value measurement.LCD display with backlight, convenient to use at night.Low battery indication, automatic & manual power off function.Compact and light, convenient to hold and carry.Equipped with sponge ball for sensor conservation.Applications includes: Environmental measurement, law enforcement, work place design, sound level analysis of machinery and engines.Specifications: Brand Name: SMART SENSORColor: BlackMaterial: ABS Digital display: 4 digitsMeasuring Range: 30130dBAResolution: 0.1dBAccuracy: 1.5dB (under reference conditions)Frequency Range: 31.5Hz to 8.5HzFrequency Weighting: A WeightingData hold: Maximum and Minimum holdSampling Rate: 2times/sTemperature Measuring Range:-10C-50C/14F-122FAccuracy: 2CResolution: 0.1CPower Supply: 3 * AAA Batteries (Not Included)Operating Temperature: 040 (10%80%RH)Storage Temperature: -1060 (10%70%RH)Item weight: 84g/0.19lbItem size: 15*5*2.8cm/5.91*1.97*1.1inPackage weight: 157g/0.35lbPackage size: 19.5 * 7.5 * 3.5/7.68*2.95*1.38inNOTE:Please don't store it at high temperature or humidity, high concentration salt or sulfur environment.If don't use it for a long time, please take off the battery to prevent leakage of battery.Please allow 1-3cm differences due to manual measurement.Package list:1 * Digital Sound Level Meter1 * User Manual(English)Package List:1 * Digital Sound Level Meter1 * User Manual(English)