LCD Display Blue Green/Yellow 1602 16X2 or 2004 20X4 or 1604 16X4 for Arduino
These are the famous 1602 16x2, 2004 20x4 and 1604 16x4 LCD Modules. The 2004 20x4 module displays 4 character rows consisting of 20 characters each. The 1602 16x2 module displays 2 character rows consisting of 16 characters each.