This mini desktop printing calculator features an easy to read, large 12 digit display and fast, 2 color printing. The uncluttered keyboard with maximum spacing allows easy use. Includes many functions including: Reprint function - Press REPRINT key to reprint operation and calculation results. Check function - use the CHECK keys to scroll up to 150 steps of past calculations. Clock/Calendar Function - Press TIME key to display current time and date. Grand total function, quick correction of mis-entries, currency exchange calculations, and cost/sell/margin calculations are a few of the other features of this powerful printing calculator. 2-way power source: AC adapter (included) or 4 AA size batteries (not included) Dimensions: 2 9/16" (H) x 6 1/2" (W) X 11 5/8" (D) (including roll holders)