This casio hr 150rce printing calculator is a 12 digit medium duty calculator with a stylish design. It has lots of features with a fast quiet 2 lines per second print speed. It is perfect for the office, home office or business use with useful functions such as cost, sell and margin, tax keys and a useful currency conversion. There is a check and correct function which allows you to recall and correct options for the last 150 operations. After print function allows you the option to print calculation after all operations are entered to a maximum of 150 steps. The re print functions allows you the option to print a calculation as often as desired. It is powered by 4 x aa batteries. . Simple algerbraic logic. Decimal selector. 3 digit comma markers. Rounding selector f. 5 4 . Item counter . Mark up mark down key. 00 key. Large key. % key . Gt memory. 4 key memory. Backspace key. Clock time stamp. Average calculations . 1 cr2032 memory back up battery . Paper size 58mm or outer roll 58mm . 2 year warranty approximate dimensions h 65mm x w 165mm x d 295mm