HUION H420 4 x 2.23" USB Art Design Graphics Drawing Pad Board With Digital Cordless Touch Pen For Computer Fast input speed and fluent writing. Compatible with all major graphics application: including Corel Painter, CorelDraw, Adobe Photoshop, Adobe Illustrator, Adobe Fireworks, Macromedia Flash, Comic Studio, SAI, Infinite Stratos, 3D MAX, Autodesk MAYA, Pixologic ZBrush and so on. Function as the cursor and the board as the screen, when you move the pen to the corner of the board, the cursor on your screen moves to the corner of said screen, etc. Pen scrolling  You can scroll documents and Web pages by pressing the middle button of the digital pen over the tablet's working area. 2048 Levels Pen Pressure; Resolution 4000 LPI (Line per Inch); Three express keys such as close current page, save current page. Anti-interference, precise locating, fast input speed and fluent writing. Low power consumption and long lifespan. Note: Only sold by Brainytrade is the real one, and it will be provided our best service we could offer.