Financial Desktop White Tax calculation Negation key 8 digits Battery/Solar LR54 Attractive desktop calculator with large 8-digit display. Design Keys quantity 29 keys Control type Buttons Cover No Housing material Plastic Product colour White Type Financial Form factor Desktop Performance Tax calculation Yes Symbolic notation Square root Conversion between Percent Negation key Yes Display Backlight display No Display number of lines 1 lines Display tilting No Digits 8 digits Power Battery type LR54 Number of batteries supported 1 Power source Battery/Solar Packaging data Package type Blister