An 11-inch high-definition backlit LCD screen provides a clear display of a decibel reading along with built-in thermometer and hygrometer. This noise meter combines multiple functions in one device and is suitable for personal use, families, classrooms, offices, studies, and industrial environments. Key features - 11-inch backlit LCD with adjustable brightness shows noise, temperature, and humidity readings in one view. - Measures sound levels from 30 to 130 dBA with an accuracy of ±0.1 dBA. - Operating temperature: -10 to 60 C; humidity range: 20 to 85%. - Frequency response: 50 Hz to 8.5 kHz. Note that environmental differences may cause a deviation of 0 to 15%, which is normal. Auto alarm indicators - Green icon: less than 60 dB - Yellow icon: 60 to 75 dB - Orange icon: 75 to 85 dB - Red icon: greater than 85 dB The alarm icon automatically updates with noise level for quick assessment. Installation and operation - Mounted on a wall or placed on a table for flexible placement. - Ready to use out of the box. - Brightness control: press ▲ to increase, press ▼ to decrease. - Detection speed and time settings: press M to adjust detection speed; long-press M to adjust the time. Use scenarios - In a home or apartment to monitor ambient noise and maintain comfort. - In classrooms or offices to manage noise levels and maintain a productive environment. - In workshops or industrial settings to track noise exposure and ensure safety guidelines are met.