We provide SAW Touchscreen/touch kit with good quality, competitive price and excellent after-sale ... prevent dust from accumulating in area that can affect SAW touch screen performance. SpecificationsTechnologySurface Acoustic Wave (SAW)Resolution4096× 4096MaterialPure glassDeviation2mmLight ... 40°C, non-condensingOperating Altitude3000mCertificationCE,FCC,CCCSize15, 17, 19, SAW touch sreen panel