... interface: USB,RS232C, keyboard interface etc 3.High shade,LCD display Basic descriptionGHC 51 series,Password keyboard which is ... Terminal models which has been supporting the system : IBM4704, Great Wall Series, Guoguang series, Shida series, New World series, Dolphin ... keyboay and the interface is KeyboardGHC515YHave15 keyboay and with LCD moduleGHC515DHave15 keyboay and with DES or 3 DES module ...