... 32”,37”,42”,52” etc Aspect ratio: 4:3/16:9For 15,17inch screen, Max resolution:1280x1024,Brightness: 260cd ... media system:amplifier; stereo Loudspeaker; magnetic-proof,net card, sound card,integrated display card, Operation system: Windows2000/XP/Vista/Win7, RedHatLinux/ ... accessories: *Barcode reader, Non-contact IC/ID card reader,Credit card reader.*Coin/Bill acceptor.*16bit/64bits Metal Keyboard, ...