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NANHAO interactive whiteboard feature an array of wires embedded behind the solid board surface that interacts with a coil in the stylus tip to determine the (X,Y) coordinate of the stylus. In the most common electromagnetic system, pens are passive and alter electrical signals produced by the board, but contain no batteries or other power source. As the pen is brought near the surface of the board, the mouse pointer will track it. Pressing the pen tip to the board will activate a switch in the pen that will signal a mouse click to the computer. The pen will invariably also have a right click button. This type of IWB is effectively a scaled up version of the Graphics Tablet used by Professional digital artists and designers. Supporters of electromagnetic IWBs claim the system is more accurate at emulating a mouse (accuracy, mouse over and right click options), offers a natural pen action that will not malfunction if a user leans on the board while writing and has the in-built ability to offer multiple input using multiple pens.
keywords:interactive whiteboard, whiteboard, IWB, OMR, optical mark reader, OMR scanner, interactive whiteboard manufacturer
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