NANO UNO I/O Expansion Shield V3.0 RED + UNO R3 Nano V3.0 ATmega328P Board for Arduino Nano
This little shield that could, takes the small and fiesty NANO and gives it all the capabilities of its bigger brother, the UNO.
The shield gives you full access to all the digital and analog ports that an Arduino NANO can possibly provide and gives each its own VCC and GND. This is the typical required format that sensor modules are supplied in.
An onboard DC socket allows for the simple addition of an external power source. This opens up parallel computing oppurtunities for those projects that are just too much for a single microcontroller.
This Nano Expansion Breakout Board Shield can be used to expand all 6 digital I/O PWM pins. It’s an easy to use expansion and prototyping interface to make experimenting with your Nano board a snap.
Nano Shield:

Designed to facilitate an easy connection for Arduino Nano and many other devices

• A perfect companion of Nano breadboard and compatible for Arduino Nano v2.x and v3.x
• 14 I/O pin (servo type with GND, power and signal)
• 8 analog pin with power output and GND
• 6 PWM pin
• Servo power input
• I2C expansion pin
• AREF output
• 3.3V output
• Size: 55 * 52 * 12mm
• Weight: 20g