1. [Scienticfic Calculator with Notepad] It comes with a 6.5 - inch writing tablet and a pen, allowing you to take notes while calculating. You can press the delete button to erase the notes and also lock it to keep them.<br>2. [349 Computing Functions] It includes fractions, statistics, complex number calculations, linear regression, base arithmetic, computer science, standard deviation, and rectangular conversions, etc.<br>3. It adopts premium plastic material keys, which are more precise than silicone keys and comfortable to touch.<br>4. The calculator notepad is foldable, dust - proof, easy to store and carry. It is suitable for high school students, college students and professional researchers.<br>5. Type: 991MS<br>6. Size: 162 x 81 x 175mm<br>7. Material: ABS<br>8. Colour: black<br>9. Package Contents: 1 x portable display. Only the above package content is included, and other products are not.<br>10. Note: Light and different displays may cause the color of the item to be a little different from the real thing. The measurement allowed error is +/- 1 - 3cm.