... Touch screen features: Optional size15" 17" 19" 22",26'', 32”,37”,42”,52” etc Touch screen:SAW or infared touchscreen or ... or SUMSUNG /AUO EtcSize: 15" 17" 19" 22" ,26i''32”,37”,42”,52” etc Aspect ratio: 4:3/16:9For 15 ... ,Credit card reader.*Coin/Bill acceptor.*16bit/64bits Metal Keyboard, stainless steel keyboard with trackball.*WIFI, GPRS,3G Modem*Web-Camera,* Thermal ...