?5 IN 1 Multi-function + Large 11 '' LED Display?This 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 Meter+Temperature Meter+Humidity Meter+Clock+Noise 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 30~130dB, accuracy: 1.5dB, frequency response range: 50Hz~8.5KHz; Humidity range: 20~85%, accuracy: 5%; Temperature range: 14~122?, accuracy: 5%. [Attention! Due to the different environments, the actual measurement value has a deviation of 0~15% 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. Long-press "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. ?Charge-Friendly?: This decibel meter built-in 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 3~5 days, ultra-long 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 out-of-the-box batteries are in a non-full 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.