SainSmart C09 Kit with MEGA ATmega2560 + XBee Shield for Arduino UNO R3 MEGA R3 Mega2560 Duemilanove Nano Robot XBee ZigBee The SainSmart Arduino MEGA, ATmega2560 is a microcontroller board based on the ATmega2560. The SainSmart XBee Shield is a compliant solution designed to meet low-cost, low-power wireless sensor networks with special needs Buy them TOGETHER and get at the REDUCE price. It is a big bargain!!!