This is a terminal adapter for the Arduino Nano. It labeled for Arduino Nano version 3.0 however, you can still use this adapter for the older version ( you just have to remember that A0-A7 are in the reverse order). You can use this adapter to easily hook up Arduino Nano to an outside world via hook up wires.
1 x Terminal Adapter board for the Arduino Nano V3.0 AVR ATMEGA328P-AU Module
Combine it with our Din Rail adaptors to turn your nano into a control panel mountable unit.