Whether in an office setting or at home, the EL2630PIII is the perfect 12-digit printing calculator for the occasional user. The extra-large display makes for easy viewing. The keys are engineered with a Microban antimicrobial agent that reduces the growth of microbes and bacteria that cause discoloration and odors. You will always be able to count on the fast and reliable 4.8 lines-per-second ribbon printer. Other functions include: mark up key for calculating cost-sell-margin calculations, percent changes, automatic add-on/discounts calculations, automatic tax keys, clock/calendar function, conversion function, constants in multiplication and division, grand total key, change sign key, large-size add and subtract keys, fully selectable decimal settings, date/non-add key, item count, average key, selectable rounding switches and four key independent memory. AC power.