15inch SAW touch screen 4,096 x 4,096 Z axis 256 scratch-free, ... or glove hand operation both USB & RS232 port l SAW touch screen panel technical specificationTechnologySurface Acoustic Wave(SAW) Sizes8.4” to 26 ... , Z-axis 256, not related with the sizes of the touch screen panelResponse time≤10msOperating temperature-10°C-70°COperating humidity10%-90 ...