This is a terminal adapter for the for arduino Nano.
It lables for arduino Nano version 3.0,
however you can still use this adapter for the older version
(just have to remember that A0-A7 are in the reverse order).
You can use this adapter to easily hook up for arduino Nano to an outside world via hook up wires.
Board Size:5.2×3.5cm(approx)
Round Red Momentary Push Button, Single Pole Single Throw.
Designed to control the movement of a mechanical part.
Typically utilized in industrial control applications to automatically monitor and indicate whether the travel limits of a particular device have been exceeded.
High precision mechanism design offering acute operation and long life.