... / U / D):70/70/60/60working time:50000hours. Touch times:>1,000,000/dothorizontal frequency:30-80KHZ field frequency ... (optional)touch Linearity: ≤1.5% Transmittance:≥85% Operated System is WIN9X,2000,ME,CE/UNIXPlastic Case size: 37 * 6 * ... 43 * 36.5 * 80 (unit: cm) 27.5kgAccessories: Touch Pen, CD-ROM drive, USB computer connection, power supply, VGA ... 100*100 & 75*75mm 15'' resistive touch screen USB