This screen decibel meter has an 11-inch LED display with adjustable brightness, so you can easily read the real-time levels of decibels, time, temperature, and humidity. [High Accuracy]: This sound level meter uses an intelligent semiconductor sensor to test decibel temperature and humidity values. Compared with ordinary sensors, it is more sensitive, accurate, and stable. The measuring 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%. This noise monitor is an excellent 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 LED display decibel meter can be hung on the wall or placed on the table. It is an ideal noise meter for testing sound levels in classrooms, studios, major traffic routes, factories, construction sites, homes, offices, etc. When using this smart decibel meter, click " " to enhance the brightness, click " " to reduce the brightness, and click "M" to adjust the detection speed, which has three speeds: fast, medium and slow. Double-click "M" to adjust the time. This decibel meter is powered by a built-in 2000mAh lithium battery and comes with a 10-foot long USB charging cable. You can put it anywhere you want and charge it anytime, anywhere. Material: ABS Color: as shown in the picture Package Contents: 1 x decibel meter 1 x charging cable Only the above package contents, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the actual object. The allowable error in measurement is +/- 1-3cm. '