Mega Io Expansion Shield V2.3 for Arduino Mega
This is version 2.3 of the Mega IO Expansion shield. This shield is extra large and includes 3 Xbee slots, 1 microSD slot, Arduino shield headers to plugin most Arduino shields. It also includes a prototyping area and breakouts for Digital pins 14 to 53, Analog pins 6 to 15 and PWM pins 2 to 9. This shield can be a major communications hub for your projects.Specifications:support most of the arduino shield;compatible with the Arduino Mega boards/DFRobot ADK/Arduino ADK;Extended TTL connection pins for four Serial ports;DIP prototyping area makes it easy to add more chips or electronic components;3 Xbee slots;1 microSD slot;power selector to select between Arduino Mega power or external power.