... surface acoustic wave(SAW) touch screen, Infrared(IR) Touch Screen, Multi touch IR touch screen, five-resistive touch screen, touch monitor ... ,support 2-32 points--Size(32”-200”),Max length:90 meter,customation is available)--Rapid response speed--High anti-light--Linking ... 2/Dual points 40 inch IR multi touch screen overlay kit Size(32"-200"),Max length:90 meter,customation is available) Etwotouch