SainSmart UNO + SainSmart LCD Keypad Shield + SainSmart XBee Shield + SainSmart Sensor Shield V5 for Arduino UNO MEGA Duemilanove The SainSmart UNO is a microcontroller board based on the ATmega328 The SainSmart LCD Keypad shield module for Arduino Diecimila Duemilanove, UNO, MEGA1280, MEGA2560 board The SainSmart XBee Shield is a compliant solution designed to meet low-cost, low-power wireless sensor networks with special needs The SainSmart sensor shield can connect to various modules like sensors, servos, relays, buttons, potentiometers. Buy them TOGETHER and get at the REDUCE price. It is a big bargain!!!