Product specification: the PS2 control sensor module is made of metal PS2 rocker potentiometer with(XY)2 axis analog output (Z) 1 button Digital output.? Match with the Arduino expansion board can make control and other products. For convenient to match the arduino expansion board interface on the design of the X Y Z axis of the circuit are separate derivation users can use 3 pin arduino private sidings true plug to extension board to use. Product features: you can control the joystick control input module x y z value and at the set value to realize the the special function it could be seen as the combination of button and the potentiometer. The data type of the x y and z d d for the analog input signal is digital input signal X and y port connected to the analog pin sensor z port connected to the digital port