... 2. supports 2 finger touch in windows7 3. waterproof, dustproof,scratchproof Infrared Touch Screen , IR touch screen panel ,IR add-on multi-touch screen ,Multi-Touch Infrared Touch screenFeaturesDust and water proofing, anti ... speed120 cycles/secondTransparency> 92%Intensity of touchOver 60,000,000 single point touchOperating Tem/Hum-10 - +50 20---85% RHStorage Tem ...