The Makeblock Me 4 Button can be used in a variety of projects. The Me 4 Button can work as function button or direction button to control your robots. There are 4 momentary buttons on the PCB board which have a great “click” to them. They all share an analog output and different analog values reflect different buttons. You can easily connect it to Me BaseBoard V1.0 or Me BaseShield V2.0 by 6 Pin RJ25 cable.