1. Support 3.3V and 5V lever , 3.3V JMP when the plug after jumper , can work togethe 3.3V main board
2. DI DO RSSI ON ASS and other XBee full indicator leads, a clearer understanding of the working conditions XBee Module
3. XBee module UART port can be connected to any two pins of Arduino( from D0 to D13), connect DOUT DINto OTHER pin by the jumper .
4. With a reset button , you can reset it for Arduino