Description: This will allow you to connect an analog signal that defines your voltage window and it will tell you (number - high or low) if your input is Internal or external window. You can define the upper and lower voltage window adjustments. Now you don't need to set a threshold in your code. This also frees the ADC from another sensor and may require more than one voltage threshold or window. Its other advantage is that it is analog, which means it is almost instantaneous (10 microseconds). Also useful in audio applications where you need to define the peak voltage at an ac signal and the peaks you want to analyze at both the top and bottom sound waves. Specification: Window voltage comparator basic parameters: Supply voltage VCC: 3-5V; Input signal SIGNAL: sine, triangle and other voltage 0-5V; Window upper and lower limit reference VREF (HIGH & LOW) Comparison level: 3-5V Output voltage signal LOGIC: rectangular wave, high level 3-5V, low level 0V. Adjust the upper and lower limits of the window level method: adjust the potentiometer. Size: approx. 27.3 x 15.1mm / 1.07 x 0.59inch Package Includes: 3 Pieces LMV358 modules + A row of pins Note: Please allow 1-3mm error due to manual measurement. Pls make sure you do not mind before you bid. Photo color might be a little different from the actual product due to color display of different monitors. Thanks for your understanding and enjoy your shopping moment.