NANO V3.0 3.0 Controller Terminal Adapter Expansion Board NANO IO Shield Simple Extension Plate For Arduino AVR ATMEGA328P
This is a terminal adapter for the for Arduino Nano. It labels 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.