A Touch Screen is an electronic visual display that can detect the presence and location of a touch within the display area. The term generally refers to touching the display of the device with a finger or hand. Touch Screens can also sense other passive objects, such as a stylus. The Touch Screen has two main attributes. First, it enables one to interact directly with what is displayed, rather than indirectly with a cursor controlled by a mouse or touchpad. Secondly, it lets one do so without requiring any intermediate device that would need to be held in the hand. Such displays can be attached to computers, or to networks as terminals. They also play a prominent role in the design of digital appliances such as the personal digital assistant (PDA), satellite navigation devices, mobile phones, and video games. . Product Advantages: 1. Highly transparent with a transmittance of 95%~99%; 2. Tempered glass with a scratch hardness of 7H: the Vandal-Proof structure makes the product more suitable for systems in public places. 3. High sensitivity: the touch screen functions by sensing electrical currents from the human body and is capable of offering immediate response at the slightest touch (a response time within 16ms at a stress load of below 30g). 4. The extremely high transmittance (up to 99%) and 7H of scratch hardness, coupled with water and dust resistant surface design makes the product best suited for general public applications. Touch Type: 4-Wire Resistive touch screen Screen Sizes: 1.8", 2.0", 2.2", 2.4", 2.8", 3.2", 3.5", 4.3", 5.7" 7" 12", 15" and 17" Diagonal Connector: FPC Response Time: 10 ms. Maximum Activation Force: 10-50 grams per square centimer Positional Accuracy: 3mm maximum error Light Transmission: Film +Film>77% Light Transmission: Film +Glass>83% Scratch Resistance: 3H pencil hardness Life Expectancy: Over 1 million Operating Temperature: -20º C ~+70º C Storage Temperature: -30º C ~ +80º C Choices of Glass Thickness: 0.7mm, 1.1mm, 2.0mm, 3.0mm, 5.5mm, Normal Glass, Chemically strengthened glass