5 IN 1 Multifunction Large 11 LED DisplayThis large screen decibel meter has a 11 LED display with adjustable brightness, and have a Diemmern Decibel Meter, which means you will have a Noise MeterTemperature MeterHumidity MeterClockNoise Level Indicator, provide convenience for your work and life. High Precision This sound level meter uses an intelligent air semiconductor sensor to test decibel temperature and humidity values. Compared with ordinary sensors, it is more sensitive, accurate and stable. The measurement range is 30130dB, accuracy 1.5dB, frequency response range 50Hz8.5KHz; Humidity range 2085, accuracy 5; Temperature range 14122, accuracy 5. [Attention Due to the different environments, the actual measurement value has a deviation of 015 which is a normal range]. Easy to Use This intelligent decibel meter is ready to use, click to enhance the brightness, click to reduce the brightness, click M to adjust the detection speed, there are three gears fast, medium and slow. Longpress M to adjust the time. Wide Application This noise monitor is a great tool for checking, monitoring or controlling and testing the sound level of any environment and can be applied to noise engineering, product quality control, health prevention and treatment, etc. This large LED display decibel meter can be hung on the wall or placed on a table, making it an ideal noise meter for testing sound levels in classrooms, studios, major traffic routes, factories, construction sites, homes, offices, etc. ChargeFriendly This decibel meter builtin 2000mAh lithium battery power supply, comes with a 9.9 FT long USB cable charging, you can put it anywhere you want to place it, charging anywhere, anytime. Endurance time of 35 days, ultralong standby only need to charge once a week. [The product is calibrated and tested and sent out, it will consume a certain amount of power. So generally outofthebox batteries are in a nonfull state, please connect the charger to keep the power sufficient before turning on and using.] If there is any problem, please contact us in time, Dienmern we will deal with you as soon as possible.