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 ... non-condensingOperating Altitude3000mCertificationCE,FCC,UL,RoHS,CCCSize15'', 17'', 19'' LCD Touch Screen