18.1inch SAW touch screen 4,096 x 4,096 Z axis 256 scratch-free,hand or glove hand operation both ... Current100mA for 12V controller 90mA for 5V controllerResolution 4096*4096, Z-axis 256, not related with the sizes of the touch ... XP, Windows NT, MAC, LinuxAgency ApprovalUL, CE, FCC, RoHS , CB 18.1inch touch screen