Features: This highly sensitive wall mounted noise meter accurately measures sound levels from 30 to 130 with ±1.5 precisions, featuring an alarm that buzzes and flashes to alert when noise exceeds set thresholds. Equipped with a large 9.6 inch LCD display with backlight for clear visibility in dark areas, this decibel meter includes easy button controls for auto start when and simple shutdown, ensuring user friendly operations. Designed for individuals, businesses, and industrial users, this versatile sound levels meter caters to anyone needing precise noise controls in settings like offices, factories, or spaces. Perfect for noise engineering, health monitoring, and environmental testing in diverse locations such as classrooms, restaurants, homes. Featuring wall mounting holes and desktop placement option, this ABS constructed noise meter flexible installation to adapt seamlessly to any environment. Specifications: Product name: Wall-mounted noise monitor interval: 2 times/second Measuring ranges: 30~130dB Resolution: 0.1dB (<100dB) 1dB (>100dB) Accuracy: ±1. (reference sound pressure standard, 94dB@1kHz) Response frequency: 31.5Hz~8.5kHz Frequency weighting characteristics: A weighting Operating environment: 0-40°C; relative humidity <80% Storage environment: -10-60°C; relative humidity <80% Power supply: supports 5V/1A; 5V/1A (not included and needs to be purchased separately) protections levels: IP20 Overall dimensions: 281x215x25mm Package Includes: A wall-mounted noise monitor some screws note: Pay attention to the storage methods.