Heavy-duty printing calculator features a 14-digit two-color illuminated display. Print 4.3 lines per second with the high-speed two-color ink ribbon. Positive numbers are printed in black and negative numbers are printed in red. Functions include Change currency conversion tax calculation tip cost/sell/margin double/triple zero keys up/off/down rounding item count memory and grand total. Decimals are at 0 2 3 4 6 add mode and F (floating). Calculator runs on AC power.