Is this a graphing calculator?

No. It is a scientific calculator with a 4-line display and a separate LCD writing tablet. It handles trig, logs, powers, roots, fractions and constants but does not plot graphs or run programs.

Can I use it in an exam?

Check your exam board's approved list first. Many exams restrict which calculator models are allowed, and the writing tablet may not be permitted at all.

Does the writing tablet save my notes?

No. It is a reusable scratch surface, not storage. Press the clear button and the writing is gone, so copy anything you need to keep.

The calculator with its built-in writing tablet, a stylus, and the button-cell batteries. The 30-day limited warranty covers the unit.

Both the calculator and the writing tablet use replaceable button-cell batteries. The tablet's cell lasts a long time because it only draws power when you clear the screen.

How does it compare with a Casio fx-991?

It offers a similar 4-line scientific feature set and adds the writing tablet and foldable body. The Casio has a longer track record for key feel and exam approvals.