When rough estimates aren't enough. Why be amateurish when you can be professional? With a pocket / desktop calculator like this model from Casio, you not only appear more knowledgeable than when holding your smartphone. The model impresses with easy-to-use buttons and excellent usability. This makes even the most complicated calculations much easier. The display not only boasts great resolution quality but also shows twelve digits, providing a clear overview. Thanks to the tiltable display, the numbers are always easy to read, which tends to reduce errors. The model is powered by a smart combination of solar and battery energy, allowing for easy use anywhere. It requires an LR54 battery, which is conveniently included.