Ejoyous Sound Level Meter is applicable for the measurement requirements of sound engineering, quality control, health prevention and various sound measurement such as factories, workshops, schools, residential, offices, road, audio or other construction site, widely applied to work and life. _x000D_ _x000D_ _x000D_ Specification: _x000D_ Color: White &Blue _x000D_ Material: ABS Plastic _x000D_ Display: LCD Display _x000D_ Dimension:6.97*2.2*1.4*inches _x000D_ Frequency weighting: A Weighting _x000D_ Frequency response: 31.5Hz -8KHz _x000D_ Level ranges: 30dB -130dB _x000D_ Resolution: 0.1dB _x000D_ Response time: (FAST)125ms _x000D_ Accuracy: 1.5dB _x000D_ Operation Environment: 0-40C 10-80%RH _x000D_ Storage Environment: -10-60C 0-90%RH _x000D_ Auto power off: Auto shout down after 12 minutes of inactivity _x000D_ Sensor: 1/2 inch electric condenser microphone _x000D_ Power: 3* 1.5V AAA Batteries(Not Included) _x000D_ _x000D_ _x000D_ Warm Tips: _x000D_ 1. Please do not use the meter under a high temperature and humid environment. _x000D_ 2. Please take out the batteries when not in use for a long time to avoid electrolyte leakage and damaging the meter. _x000D_ 3. When measuring the noise outside, please mount the wind-resistant ball on the head of the microphone from being directly blown by wind and measuring other noise. _x000D_ _x000D_ Quality Guarantee: _x000D_ Free exchange within 12 months product warranty. If you have any problems, please feel free to contact us. _x000D_ _x000D_ Package Contents: _x000D_ 1 * Ejoyous Sound Decibel Meter _x000D_ 1 * Sponge Ball _x000D_ 1 * Package Box _x000D_ 1 * User Manual