1. 11inch Decibel MeterThis decibel meter features an 11inch highdefinition backlight LCD screen with adjustable brightness, along with a decibel meter, meaning you'll have a noise meter thermometer hygrometer. It is widely applicable for personal use, families, classrooms, businesses, studies, industrial settings, etc. 2. High Accuracy MeasuringMeasuring range: 30 130 dBA, Measurement accuracy: ±0.1 dBA, Working temperature: 10 60 °C. Humidity Range: 2085%. Attention! Frequency response range: 50Hz8.5KHz. Due to different environments, the actual measurement value may deviate by 015%, which is within the normal range. 3. AUTO Alarm Icons: The noise alarm face icon will automatically switch according to the decibel level at different levels. Green IconLess than 60 dB; Yellow Icon6075 dB; Orange Icon7585 dB; Red IconMore than 85 dB 4. Easy to Install and UseOur decibel meter can be mounted on the wall or placed on a table. This Wall Hanging Sound Level Meter is ready to use. Click '' to increase the brightness, click '' to decrease the brightness, click 'M' to adjust the detection speed, and longpress 'M' to adjust the time jiggyough.