XBee Shield Mounts directly onto your Arduino DIN and DOUT pins of XBee can be connected to either the UART pins or any digital pin on the Arduino (D2 and D3 default) 3.3V power regulation and level shifting on-board 12x11 grid of 0.1" spaced prototyping holes Power, DIN, DOUT, RSSI and DIO5 indicator LEDs