This a parallel 4x20 Blue mode Super Twisted Nematic (STN) with built-in HD44780 equivalent controller. White LED backlight makes for white characters on blue background. It has 6 o’clock viewing.

The LCD requires 4 to 8 input lines for data and a data read/write I/O Line, a enable signal, and a instruction/data register select I/O line. This LCD is a much less expensive alternative to the serial LCDs, but requires more I/O.