_x000D_Features:_x000D__x000D_OOTDTY_x000D_PCB-onboard- installation; 30~120dBA wide range, 20~12.5KHz wide frequency measurement. _x000D_With this module, customers no longer- have to worry about complex noise signal processing, and can focus-on- areas of expertise and create value- for customers faster. _x000D_Mainly used for various noises such as environmental noise, traffic noise, workplace noise, building construction noise and social-life noise. _x000D_Pre-polarized back-electrode electret condenser microphone with wide dynamic range and stable performance. _x000D_Both slow and fast- measurement modes are available to meet different requirements. _x000D__x000D__x000D_Specifications:_x000D_Type: TTL5V/RS485 5V(optional) _x000D__x000D__x000D_Package Includes:_x000D_1xNoise Decibel Detection Module _x000D__x000D__x000D_Note:_x000D_Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. _x000D_Due to the difference between different monitors, the picture may not reflect the actual color of the item. _x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D__x000D_