... 3G,Printer,barcode,free SDK,C# 5.3.5 Color touch screen 3.5" Color touch screen payment terminal,Windows CE 6.0 ... screen.2.Option configuration:RFID,Camera,GPS,WIFI/Bluetooth,1D barcode scanner,2D barcode scanner, ... 4”Clients Monitor 2x20 LCD caharacter height min 7 mm ( you can use graphic display)Keyboard ... least two SAM slotsWireless Communication UnitsRF module or wifi 802.11./b/g/n Ethernet 10/ ...