The Xbee Expansion Board is a compliant solution designed to meet low-cost, low-power wireless sensor networks with special needs. The module is easy to use, low power consumption, and the provision of critical data between devices reliable transmission. As the innovative design, Xbee-PRO can be in the range 2-3 times beyond the standard ZigBee modules. Xbee-PRO modules work in the ISM 2.4 GHz frequency band.
The Xbee shield allows an Arduino board to communicate wirelessly using ZigBee. It is based on the Xbee module from Digi (formerly MaxStream). The shield can be used as a serial/usb replacement or you can put it into a command mode and configure it for a variety of broadcast and mesh networking options.