16 * 2 Lcd module is 16 characters wide and 2 row character Lcd module made of high quality   material. It has 16 pin connecter with blue black light. It can be easily controlled by MCU and can be used in any embedded systems, industrial device and hand held equipment’s.

20* 4 LCD module is 20 characters wide and row character LCD module made of high quality   material. It can be controlled with 6 digitals line. It has built in characters set of English / Japanese. It has 16 pins connector. It can be used in different projects. It has connection port of 0.1" pitch.

20×4 LCD Display is required if you want to add some visual output to your Arduino projects. If you have few IO lines to play with, the Parallel 20×4 LCD Display with IIC/I2C interface is a quite good solution. The display is 20 character by 4 line display that has a very clear and high contrast white text upon a blue background/backlight.