[4 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+thermometer+hygrometer+clock, 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 [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 [Charge-Friendly]: This decibel meter built-in 2000mAh lithium battery power supply, comes with a 10 ft long USB cable charging, you can put it anywhere you want to place it, charging anywhere, anytime. If there is any problem, please contact us in time, we will deal with you as soon as possible Origin: US(Origin) 4-in-1 Digital Decibel Meter Wall Hanging Sound Level Noise Meter 30-130dB Range 11 Inch Large LED Display Multi-function About this meter: ; Humidity range: 20~85%, accuracy: ±5%; Temperature range: 14~122℉, accuracy: ±5%. . 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. . Product parameters: MaterialABS Product Size:270* 118*35mm Led Screen display Detection method for Noise : Electret Condenser microphone Concentration unit for Noise : dB Temperature unit : Celcius Power supply:rech