4-wire resistive touch screen, you can use a pen, finger, gloved hand, credit cards and many other touch media to control. It is resistant to fluids, food and all kinds of impurities, has very strong adaptability to a variety of pollution, has good stability and reliability at the same time, light and easy to assemble and cost characteristics of the ideal input device for portable mobile devices, personal assistants, industrial control, medical equipment, high frequency of use, user friendly, and ideal input device for different application system.