... Technology:Surface Acoustic Wave(SAW) Touch screen type, Durability of ASW touch screen:over 50 million touches on one location ... without failure:Resulution:4096*4096.3 Optioal screen size :15.1"/ 17.1"/ 19.1"/ 22. ... Weight:45KG.11 Optional Component :computer machine,card reader,barcode reader,metal keyboard,micro-printer,fingerprint reader.12:completely according to your ...