Scientific Calculator with LCD Notepad, Professional Portable Foldable Calculator for Students, Teacher, Engineer, Upgraded, with a Pen Included

About this item : 

• 【Innovation】: Advanced 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.
• 【349 Functions For 991MS】: Include fractions, statistics, complex number calculations, linear regression, base arithmetic, computer science, standard deviation, polar-rectangular conversions, etc..
• 【417 Functions For 991ES】: 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.
• 【Foldable & Portable】: 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.
• 【Solar panel + replaceable battery】: The main screen is powered by solar where as the LCD requires a button cellCR2032) that's included.
• 【Good Quality】: Scientific calculator is durable and has premium plastic keys which are more sensitive and precise compared to silicone keys.

Professional

3-line display shows inputs and results at the same time.

Professional grade scientific calculator with 349 scientific functions for 991MS and 417 scientific functions for 991ES.

Long lifetime

Calculator powered by Solar Energy and writing tablet powered by replaceable coin button battery CR2032.

Writing with a stylus

when taking notes, you can find the pen on the bottom side of the calculator (as the picture shows)

Easy to clear

when you want to delete writing, you can using the clear button,one press to delete (as the picture shows)

Prevent accidental deletion

when you writing with the wirting tablet, using lock button to prevent deletion or unlock (as the picture shows).

Ideal for junior & high school students, college students and professional researchers.

The calculator for secondary school meets most of the mathematical needs of trigonometric functions, logarithms and antilogarithms, powers, factorials, permutations, combinations, statistics, angles, coordinates, etc.this calculator is the perfect birthday, valentine, christmas gift for students, teachers, professors, kids, friends, parents!