14-digit thermal printing calculator features Prompt Logic technology. The interactive display prompts you for input to calculate installment loans, cost/sell/margin, tax settings and program text. Help key explains the various features either on the display or on the tape. Currency exchange allows you to work in two currencies with the push of a button. Text keys store and print up to six custom messages on your calculator tape printout. With simple prompting, program key helps you set tax rates, currency rates, time, date, language and opening message. Calculator prints 8.0 lines per second. Other functions include cost/sell/margin keys, time calculations, and two independent tax keys. Design includes a two-color, backlit, dot matrix display. Printing calculator is AC-powered.