RioRand (TM) IIC/I2C/TWI Serial 2004 20x4 LCD Module Shield For Arduino UNO MEGA R3 RioRand LCD Module for Arduino 20 x 4 *Black on Yellow RioRand LCD module based on the popular HD44780 controller Works for with Arduino and other micro-controllers Includes tutorial for interfacing LCD with Arduino boards 4 rows, 20 characters