Three in one: Three functionalities integrated with blackboard,curtain and interactive function. 1.Environment -friendly, no pollution and radiation, highly-precise orientation with no abrasion and noise,utilize little system resource. 2.Adopting anti-aliasing technology with the horizontal linear processing thus makes it stable and reliable with swift reflection and high resolution thereby your writing is smooth,fluent and clear. 3.Convenient to install and adjustable at any angle with the options of wall-mounted,slide style, mobile and height adjustable style etc. 4.High-frequency sampling and transporting, quick response with no delay. 5.Powerful software with multi functions to choose, such as the changeable colour and the sizes of the pen and can be upgraded freely. 6.Different sizes of models to choose and thecustomerized one is available. Working principle: Touch-sensitive screenFace of the whiteboard:Adopting the import waterproof and anti-abrasion materials with a high definition displaying facility. Use the general cleanser or alcohol to clean the whiteboard.Interface:USB Press precision: (pels)< 5Power:< 2WPower supply model:USB power supply without any external power supplyRequired hardwares:General PC or laptopsOperating system:Win2000/XP/2003/VistaTemperature:-40°C +60°CWays of installation: