As the name implies, the Arduino Wireless SD shield serves two functions. Foremost, this shield allows you to easily interface with Xbee transceiver modules to create mesh networks, and other wireless devices. Secondly, the micro SD socket allows you to store and access a large amount of data. Whether using these functions by on their own or together, this chip greatly enhances the capabilities of a standard Arduino. The best part about this shield is how easy it is to use. In no time flat, you can have its various components up and running.
Step 1: Plug in the Xbee
Plug in your Xbee modules in order to use the shield as a wireless transceiver.
Make sure the module's pointy end is lined up with the edge of the board.
If you are using the shield for wireless data transfer, you will need two or more of them.