Features:nu3010Scientificu3011uff1aAdvanced idea of combining a calculator with an LCD notepad, There is a built in stylus to write with, which allows you to take notes while calculating. You can delete the notes by using the delete button, or you can lock it to save it.

u3010417 Functionsu3011: The calculator has all the buttons you find on a standard scientific calculator, is very versatile, and can be used for children or even math majors. It contains more operations than basic scientific calculator, including integrals, derivatives, statistics and complex number calculations, etc.nnu3010Foldable & Portableu3011NEWYES Calculator Notepad can fold up and the LCD doubles as a cover that closes to put away neatly when you no longer require it, that fits nicely in your pocket. this is ideal for students, engineers, teachers and professional researchers.nnu3010Solar panel + replaceable batteryu3011the main screen is powered by solar where as the LCD requires a button cellCR2032) that"s included.nnu3010Good Qualityu3011NEWYES Scientific calculator is durable and has premium plastic keys which are more sensitive and precise compared to silicone keys.

Specifications:

Model: 991ES

LCD Display: 6.5 Inches

Button Battery: CR2032
Calculate Funtions: 417 Functions

Size: 16.2cm * 1.75cm * 8.1cm

Package included:

1 * 991ES Scientific Calculator

1 * Stylus Pen

1 * Manual