Here's some information about how it works and its common applications:

Two-Channel Encoder: This module features two channels, which means it provides two separate outputs that can be used to detect changes in the magnetic field. These channels are often labeled as "Channel A" and "Channel B."

Hall Effect Sensors: Hall effect sensors are used to detect changes in the magnetic field. When a magnetized object, such as a rotating wheel with magnets attached, passes by the sensor, it generates electrical signals proportional to the magnetic field strength. This allows the module to determine the position of the object.

Digital Output: The module typically provides digital output signals for each channel. These signals change state as the magnetized object rotates, making them suitable for use with microcontrollers and digital logic circuits.