HiLetgo 1620 Serial LCD Module Display With Blue Backlight HD44780 Controller Character for Arduino Uno R3 Mega 2560 Imported Viewing area size: 64.5mm x 16mm Color: white on blue with backlight Can display 2-lines X 16-characters Commonly-used HD44780 controller is built in this 1602 LCD module Easy to use. Less I/O ports are occupied, only four - VCC, GND, SDA (serial data line), SCL (serial clock line).