?5-in-1 Function?: This wall mounted decibel meter combines a sound level meter, humidity meter, temperature meter, clock, WiFi connection and noise level indicator into one. The noise level indicator containing automatic alarm icons for quick identification of noise level status. The noise decibel monitor can accurately and swiftly measure decibels, temperature, and humidity.The sound meter decibel is powered by a high-capacity 2000mAh lithium battery and comes with a approximately 10-inch USB data cable for charging anywhere, anytime. ?11 in LED Large Display?: The 5-in-1 decibel meter features an 11 in led noise meter large display screen. Brightness can be adjusted, detection speed can be altered, and time settings can be easily adjusted through simple button operations. Press "?" to increase brightness, "?" to decrease brightness, press "M" to adjust detection speed with three settings: fast, medium, and slow, and long press "M" to adjust time. ?Precise Measurement?: This decibel meter wall mounted uses intelligent air semiconductor sensors to measure decibels, temperature, and humidity values. Compared to ordinary decibel meters, it is more sensitive, accurate, and stable. ? Measurement range for decibels: 30~130dB, accuracy: 1.5dB, frequency response range: 50Hz~8.5KHz; ? Humidity range: 20~85%, accuracy: 5%; ? Temperature range: 14~122?, accuracy: 5%. Note: Due to different environments, an error range of 0~15% in actual measurements is considered normal. ?Widely Used?: The decibel meter can be placed flat on a desktop or used as a wall-mounted device. Added WiFi connection for easier operation. The sound decibel meter can be used in classrooms, factories, construction sites, homes, and offices etc. The noise decibel meter helps different industries and fields maintain appropriate sound environments, prevent noise pollution, and protect people's hearing and quality of life. ?Professional After Sales?: For this wall-mounted noise meter, We offer one year post-purchase support 12 hours service. If you have any questions or concerns about the noise decibel meter, feel free to contact us via email or message. Our professional team will promptly address your issues and resolve any problems within 12 hours.