Our engineers at Monroe worked tirelessly to develop the best available printing calculator on the market. The Monroe UltimateX combines all of the favorite features from previous Monroe models and is the top-of-the-line 12-digit print/display heavy-duty calculator. As a result, the Monroe UltimateX is the preferred printing calculator by accountants. The Monroe UltimateX features our newly updated printer which, for the first time in Monroe history, is compatible with supplies such as the Monroe M33X ribbon cartridges, Monroe P65M ribbon spools, and our signature 15 lb. or 20 lb. paper rolls. Using our high-quality Monroe supplies will provide you with the optimal print quality.