The Aurora DT401 is built for durability and reliability and is a great calculator for heavy duty applications, the huge 12 digit LCD display features extra large digits and is adjustable to enable easy viewing. The calculator is designed for ease of use with large keys, large numerals, an extra large addition key and rubber feet for desktop stability. Special features include the 'Currency Conversion' function which allows you to program and store a currency exchange rate and then easily convert between your local and chosen currency and the 'MU' or mark up key, which is great for profit and sales calculations.