Touch Screen specification: Size:19'' 4:3 SurfaceHardness3HOptical Clarity80%↑OperatingTemperature-10C 60CEnduranceTest strikesOver1millionOperatingVoltageDC5VResistance200Ω 900ΩLinearity1.5%FaceplateSurfaceAnti-glarecoating,glare coatingFilm Thickness0.175mm, 0.188mmGlass Thickness0.7mm, 1.1mm,1.8mmOperationPressure20 150gStorageTemperature-30 80MessageNoise5m sec 15m secOperatingCurrent5mA 25mAHumidity<95%IsolationResistance20MΩ↑ DC25VSealable againstdust ,water, oil , static