... : USB,RS232C, keyboard interface etc 3.High shade,LCD display Basic descriptionGHC 51 series,Password keyboard which is ... , Haiwei series, WYSE series, Shunhua series, and DES, LCD, LED and voice modules are provided for users to choose ... is KeyboardGHC515YHave15 keyboay and with LCD moduleGHC515DHave15 keyboay and with DES or 3 DES module TypeGHC 512KeypadMechanical key bodyInterfaceTTLPower supplyDC ...