This is a Xbee Zigbee base board with logic level converter between 3.3v
and 5v. You can select the logic level by jumber. So you can easily
interface the zigbee with 5v and 3.3v microcontrollers. The default
setting is 5v so you can interface with 5v microcontrollers like 8051,
PIC, ATmega or kits like aurdino ..