(1) Built-in Memory Card Reader. The first tablet ever that comes with a 4GB MircoSD Card which makes it more convenient for your to save your artwork. Can be extended to Maximum 64GB. (2) 8 Express Keys & 16 Soft Keys. More express keys available for you to customize based on your own preference. (3) Rechargeable Pen Included. Comes with a rechargeable pen which is lighter and can be used for at a maximum of 800 hours after every 2 hours' charging. (4) Compatible with Many Drawing Programs. such as Krita Paint Tool SAI Photoshop Illustrator GIMP Corel Painter CorelDraw etc. (5) Widely used for 3D program design industrial design image editing digital graphics drawing online education comic and animation design fields.