The refurbished units, when listed, are direct from HP manufacturing, and are units refurbished by them. In many respects they are better than new calculators because they have been individually hand tested and verified to work perfectly. They include calculator, case, manual, and batteries, and come with a 90-day warranty. They may have scuffs, but work as good as new. The refurbished calculators have the gold faceplate and black front.

Over 250 Business Functions
Easily calculate time value of money, amortization, mortgages, balloon payments, internal rate of return, net present value, bonds, depreciation, forecasting, currency conversions (including Euro), percentages, and more. Two Methods of Data Entry
Choose between Reverse Polish Notation (RPN) and algebraic data-entry modes. RPN is an efficient data-entry mode that expresses a sequence of calculations without using parentheses, which reduces the number of keystrokes.

List-Based, Two-Variable Statistics and Forecasting--and a Clock with Alarms
Review your calculations through data stored in a list format. Scroll through and edit as the information changes--the built-in clock keeps you on time.

HP Solve Application
Write and solve equations for any variable without rewriting your original equation.