NANO 3.0 controller Terminal Adapter / Nano Expansion board / NANO IO Shield V1.O Simple Extension Plate
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.