... operation both USB & RS232 port l SAW touch screen panel technical specificationTechnologySurface Acoustic Wave(SAW) Sizes8.4” to 26” Controller ... CHumidity10%-90% RH at 40°C, non-condensingOperation Altitude3800mAccessoriesConnector cables, double-sided glue, dust-proof stripesAgency Approval UL, CE, FCC, ... NT, MAC, LinuxAgency ApprovalUL, CE, FCC, RoHS , CB 32inch SAW touch screen 32inch touch panel