Sound Level Meter, Decibel Meter 30-130dBA, LCD Digital Audio Noise Level Meter Sound Level Meter Monitor dB Meter Measuring Tester, Auto Power Off, for Home, Office, Factory, Cinema

1. Data retention function, measurement of maximum and minimum values. 2. Low battery indication, automatic and manual shutdown function. 3. Equipped with a sponge ball for sensor protection. Specification: Accuracy: 1.5dB Frequency range: 31.5Hz to 8.5Hz Measurement level: 30-130dBA Resolution: 0.1dB Temporal weighting: fast Power supply: 3 AAA 1.5V alkaline batteries (not included) Microphone: 1/2 inch electret condenser microphone Operating temperature: 0-40 Operating humidity: 10% -80% RH Storage temperature: -10-60 Storage humidity: 10% -70% RH Weight: approx. 111g / 3.9oz Size: approx. 155 * 50 * 25mm Package list: 1 * digital sound meter The user manual 1. Open the battery compartment cover, enter 3 new * AAA batteries, close the battery compartment cover. 2. Press the start power switch button. 3. Wait until the LCD display is normal, can enter the test state. 4. You can press the "MODE" button to select "MAX", then read the maximum noise. 5. Backlight switch button can turn on or off the backlight. 6. When the battery symbol appears, replace the battery for instructions on low power consumption. Precautions: 1.Do not use the device in high temperature and humidity environments. 2.If it is not used for a long time, remove the battery from the machine. 3.When the unit is used in windy conditions, it is essential to mount the windshield to avoid picking up unwanted signals. 4.Condition of Operating Environment: Humidity≤80% RH, temperature from 0 to 40 ° C