... stability 4.High durability 4wire touch screen, 4wire touch panel, touch screen, touch panelSurface Hardness 3HOptical Clarity 80%Operating Temperature -10C ~60CEndurance Test ... Thickness 0.7mm, 1.1mm,1.8mmOperation Pressure 20~150gStorage Temperature -30°C ~80 °CMessage Noise 5m sec ~ 15m ... Isolation Resistance 20MΩ↑ DC25VSealable against dust ,water, oil , static touch screen panel controller