Track and edit editing calculator's 2-line LCD display combines the editing capability of spreadsheets with the simplicity of calculators. No longer do you have to re-do long and complicated calculations after a mistake with this calculator. Lets you check up to 79 entries for verification and corrections. The 2-line LCD display clearly shows exactly what you entered on the top line, and provides the results on the bottom line, so you can be sure of your numbers. Battery(s): 1 LR1130 Measures 6 x 4 1/4 x 1/2 inches.