SainSmart MEGA, ATmega2560 + SainSmart Sensor Shield V4 + SainSmart XBee Shield for Arduino UNO MEGA Duemilanove The SainSmart LCD Keypad shield module for Arduino Diecimila Duemilanove, UNO, MEGA1280, MEGA2560 board The SainSmart sensor shield can connect to various modules like sensors, servos, relays, buttons, potentiometers. The SainSmart XBee Shield is a compliant solution designed to meet low-cost, low-power wireless sensor networks with special needs.