The 4 Wire Resitive touchscreen consists of a glass layer with a conductive coating on top and a polyester top sheet with a conductive coating on the bottom. The conductive surfaces are held apart by "spacer dots", usually glass beads that are silk-screened onto the coated glass. When a person presses on the top sheet, its conductive side comes in contact with the conductive side of the glass, effectively closing a circuit (this is called pressure sensing). The voltage at the point of contact is read from a wire connected to the top sheet.It can be touched by finger, gloved finger, leather or stylus pen.It is inherently of many advantages such as high accuracy, quick response, drift-free, stable and long durability for a life time of 1,000,000 times finger touches. Interface Type: USB or RS232 Resolution 4096x4096 Screen Ratio 16:9 Material Glass + Film or Film + Film Certificates CE, FCC, RoHS Input method Finger or touch pen Position accuracy 1.15~2.5mm Operating Voltage DC ≤ 10V Operating current 5~25mA Response time Less than 10ms Touch action force 20~100g Operating temperature -10°C~60°C Storage temperature -20°C~70°C Surface hardness 3H Working environment Under sunlight, indoor and outdoor Transparency ≥80% Isolation resistance ≥20MΩ DC 25V X.Y resistance 100Ω~1000Ω according to the size Linearity ≤1.5% The number of hits ≥1,000,000/point Warranty 1 year Support Systems Windows 2000/Windows XP/Win 7/ Win 8/Windows NT/Linux/Mac