Thanks to a host of useful features, the LS-82Z is one of the most user-friendly calculators around. The upright LCD helps prevent overhead glare and eye strain, while the large display makes numbers appear clear and crisp even in the dimmest lighting. Combine these features with large keytops and keytop characters, and you'll find that miscalculations are almost impossible. Both solar and battery power ensure that you'll always finish whatever you start, whenever and wherever you are so you don't miss a step.