11 LED LARGE DISPLAYDiemmern large screen decibel meter features 11 LED display with adjustable brightness decibel meter chip, i.e. Noise Meter Temperature Meter Humidity Meter Clock Noise Level Indicator, better for your life and work. Convenient ChargingThe decibel meter is powered by a builtin 2000mAh Liion battery, comes with a 9.9foot USB charging cable, and the plug is included in the package, so you dont need to look for another plug to charge it. You can do it anytime and anywhere. Battery life is 35 days, long standby time only need to charge once a week. [The product is calibrated and tested and sent out, usually out of the box the battery is in a nonfull state, please connect the charger to keep it fully charged before turning it on and using it.] Accurate PrecisionThis sound level meter uses a smart air semiconductor sensor to test decibel temperature and humidity values. It is more sensitive, accurate and stable compared to ordinary sensors. Measuring range is 30130dB, accuracy 1.5dB, frequency response range 50Hz8.5KHz Frequency response range 50Hz8.5KHz; Humidity range 2085, accuracy 5; Temperature range 14122, accuracy 5. [Attention Due to different environments, the actual measured value has 015 deviation, which is normal range]. Easy to operateDiemmern Smart Decibel Meter is ready to use, click to enhance the brightness, click to reduce the brightness. Long press M to enter the time setting. Tap M to adjust the detection speed, respectively, there are three gears can be adjusted to suit you. Wide ApplicationThis noise monitor is an excellent tool for checking, monitoring or controlling and testing the sound level of any environment, which can be applied in the field of noise engineering, product quality control, health prevention and control, etc. The Diemmern Large LED Display Decibel Meter can be hung on the wall or put on a table, suitable for testing classrooms, studios, traffic avenues, factories, construction sites, homes, offices and other places. It is the ideal noise meter.