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. TechnologySurface Acoustic Wave (SAW)Resolution4096 * 4096MaterialPure glassDeviation2mmLight transmission90 ... 40°C, non-condensingOperating Altitude3000mCertificationCE,FCC,RoHSSize15'', 17'', 19'' SAW Touch Panel