This is how calculating works. Paperwork is annoying, but constant calculations at the desk are even worse? Do you need to incorporate many different factors into your calculations? The pocket and desktop calculator helps with that. Whether for large or small calculations, its clear functions and easy-to-use buttons make it a real assistant. You can display up to twelve digits on the screen with this model. In unfavorable lighting conditions, the adjustable display can be easily customized, ensuring that all numbers are always clearly readable. The calculator operates with a combination of solar and battery power. In bright light conditions, the solar cells provide the necessary energy. In darker conditions, the batteries take over. The calculator requires an LR44 type battery.