The P170-DH-3 is the ideal desktop printing calculator to control your business or home finances. The compact size allows the P170-DH -3 to fit on your desktop without taking up too much space. But don't let the size deceive you; this unit is packed with important business functions such as the ability to calculate your cost, selling price or profit margin with the touch of a few keys. Power Source(s): AC; Display Notation: Numeric; Number of Display Digits: 12; Display Characters x Display Lines: 12 x 1.