1、ACCURATE MEASUREMENT SOUND: Sound level meter tester is an instrument used to measure environmental noise. With digital technology, it can accurately measure the strength and frequency of sound. 2、WORKING PRINCIPLE: The Decibel meter's microphone will collect sound signals from the environment and convert them into electrical signals.The AD converter will convert the electrical signals into digital signals, which will then be transmitted to a digital signal processor for processing and analysis. The processor calculates the strength and frequency of the noise and displays the results on the screen. 3、WALL MOUNTED: Wall mounted decibel meter is wall mounted with mounting holes, can be mounted on the wall, convenient and does not take up space. 4、HIGH ACCURACY: Wall hanging type decibel noise measuring has high accuracy, wide measuring range, easy to use and portable. 5、WIDELY USED: Sound level meter tester can be widely used in industrial noise monitoring, environmental noise assessment, building construction noise monitoring and other fields.