This shield is an multi-function senor expansion board that is Arduino compatible. It not only expands the existing interfaces such as data/analog port on the Arduino board, IIC interface, SPI interface, but also the RS485, SD card module interface, Xbee/Bluetooth Bee Bluetooth wireless data transmission interface and APC220/Bluetooh V3 Bluetooth wireless data transmission interface which makes the connection of most sensors to Arduion very easily. It can do you a favor in your electronic production with Arduino. Compatible with Arduino Uno, Duemilanove, Mega 1280 and 2560

This latest V5 IO expansion shield is now supporting Xbee. It even supports SD card which provides the ultimate functional expansion for Arduino so far. As its predecessor, it supports RS485、APC220、Bluetooth communication、and servo control etc.

Features:

Expand 14 digital IO interface (12 steering gear interface)and power
six analog IO interfaces and power
One digital port interface for external power supply terminals
Digital port external power supply and on-board electrical automatic switch
One external power input terminals and one input needle
RS485 interface (D0-RX, D1-TX, D2-EN)
Reset button
 Xbee wireless digital interface
APC220 wireless digital interface
IIC/the I2C/TWI interface (A4-SDA, A5-SCL)
3.3 V output port
SD card module interface
Servo Power connector, can you use for Servo controller board.

Support Module Series :

Support RS485
Support XBee, XBee PRO, XBee S2
Support BlueBee Bluetooth
Support APC220
Support SD card read/write