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