The XBee Shield included in the kit can be directly mated with an Arduino Pro or USB board, providing it with wireless communication capabilities via the popular XBee module. The shield's serial pins (DIN and DOUT) connect through an SPDT switch, allowing you to select a connection to either the UART pins (D0, D1) or any digital pins on the Arduino (D2 and D3 default). Power is taken from the 5V pin of the Arduino and regulated on-board to 3.3VDC before being supplied to the XBee. This ensures the correct power supply for the XBee module.
The shield also includes LEDs to indicate power, activity on DIN, DOUT, RSSI, and DIO5 pins of the XBee. The Arduino's reset button is conveniently brought out on the shield, and a 12x11 grid of 2.54mm spaced holes are available for prototyping. Please note that the boards in this kit are not designed to source the power required for the Cellular XBee line. They are only compatible with the 802.15.4 XBee variants like the ones included in this kit.
Before using these modules outside of the United States, please check with your local laws regarding radio communication to ensure compliance.