... CE OS 4.3G,Printer,barcode,free SDK,C# 5.3.5 Color touch screen 3.5" Color touch screen payment terminal,Windows CE 6 ... asynchronous communication port(max.115200 bps) preferableGSM/GPRS /GPS Modem Internal GPRS and GPS modem (data mode, GPRS TCP/IP model) and ... internal GSM/GPRS and GPS antennaPrinter2’’ Thermal printer feature58 mm paper widthSecurityDES, TripleDES, RSA, ...