This is how calculating works. Paperwork is annoying, but constant calculations at the desk are even more so? Do you need to incorporate many different factors into your calculations? The pocket and desktop calculator is here to help. Whether it's large or small calculations, its clear functions and easy-to-use buttons make it a true assistant. This model can display up to twelve digits on the screen. In unfavorable lighting conditions, the tiltable display can be easily adjusted to ensure that all numbers are always clearly readable. The calculator operates on a combination of solar and battery power. In bright light conditions, the solar cells provide the necessary energy. Conversely, in darker settings, the batteries take over. The calculator requires an LR44 type battery.