**Characteristics: - Indicates decibels by the manometer - Show the current noise reference - Display min / avg / max values ​​in decibels - Decibel screen by the graph of - Can calibrate the decibel for each device **Notes This application is not designed for professional use, it can be used professionally (only if it is correctly leveled), If it is not well leveled. It does not guarantee an accurate measurement of noise. Since each device has a different response to noise, a comparison with a