This slide potentiometer is a linear variable resistor with a total resistance of 10k. When you move the lever from one side to the other, its output voltage will range between 0 V to 5V. While the remaining pin is connected to a green indicator LED. You can use the indicator LED to visually display the change on the potentiometer.
This slide potentiometer can be combined easily with the Arduino IO/sensor expansion board. It also can connect with arduino controller and other sensors to make a lot cool works.