This a parallel 4x20 Yellow mode Super Twisted Nematic (STN) with built-in HD44780 equivalent controller. It has a LED backlight with 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.  Follow this link for the specifications