| Item: | Specification | 
| Screen size: | 21.5 inch | 
| Structures: | Cover Glass+ITO Glass | 
| Surface Hardness: | >6H | 
| Surface Treatment: | AG/AF/AR | 
| IC Controller: | ILITEK 2511 | 
| Operating temperature: | -20℃~70℃ | 
| Storage temperature: | -30℃~80℃ | 
| Supply Voltage: | 3.3V~5V | 
| Transmittance: | 86% Min | 
| Interface Mode: | USB/IIC/RS232 | 
| Operating System: | XP win7,8 Android Linux | 
| System Driver: | No need(USB plug and play) | 
| Touch Points: | 1-10 | 
 
 Structure & Operating Principle:
 Capacitive touch screen is a piece of 2 layer of compound glass with double side transparent conductive coating that conducts a continuous electrical current across the sensor.
 There is electrode pattern printed along the edges distributes a low voltage filed over the conductive layer.
 The human body is also an electrical device which has stored electrons and therefore also exhibits capacitance.
 When a finger touches the screen and draws a minute amount of current to the point of contact ,creating a voltage drop.
 The current flow from each corner is proportional to the distance to the touch point. During a touch , capacitance forms between the finger and the sensor grid. The touch location is calculated from the changing electrical characteristics of the sensor grid.
  
 Projected Capacitive touch screen Benefits:
 1. Response speed fast, smooth touch.
 2. Flat panel, more high-end atmosphere, eliminating infrared touch screen surface with a groove edges are not allowed to shortcomings.
 3. Any point can withstand more than 50 million times touch.
 4. Explosion-proof and durable, scratch-resistant, anti-collision, anti-radiation within the core capacitive touch ensure stable, anti-interference ability.
 5. Operating systems strong compatibility.
 6. Intelligent automatic calibration, use forinternal / external variety of environments.
 7.Long life, low maintenance costs.
  
 
  
 Application:
 Touch Screen All in one Computers
 Touch Screen laptop
 POS Machine
 Industrial Control industry
 Touch Monitor
 Information Kiosks
 Gaming Lottery ect 
 Multimedia marketing
 Banking / Fanancial System
 Touch Table
  
 Delivery Time:
 Samples in stock: 1~3 working days.
 Customized project: 10~15days for samples.
 Mass production: 10~18days
  
 Customer question
 1. How about Sample lead time ?
 -------Custom samples 12-18work-days,standard samples 5~10work-days.
 2. How about mass production lead time ?
 ------ 15 days after sample confirmed.
 3. Shipping?
 ------Usually we deliver our goods by DHL,UPS, FedEx etc.
 4. Payment term?
 ------ T/T or Western Union 30% deposit, 70% balance should be paid before shipment.
 5. How about the warranty?
 ------ Warranty 1year.