Wifky!

Extends 14 digital pins into 3PIN
Extends 8 analog pins into 3PIN
Comes with a Bluetooth Bee wireless module header
Comes with a NRF24L01 wireless module header
Comes with a serial communication pin
Comes with an I2C communication pin
Comes with a DC jack for external power (DC 7-12V)

https://wiki.keyestudio.com/Ks0146_keyestudio_Nano_IO_Shield

https://www.itead.cc/wiki/Arduino_Nano_IO_shield

https://www.keyestudio.com/free-shipping-new-keyestudio-nano-io-shield-for-xbee-and-nrf24l01-socket-for-arduino-p0309.html