Ideal for everyday calculations and small business tasks, this easy-to-read calculator features an extra-large 0.78" (20mm) digit size. The angled display prevents overhead glare and eyestrain. Large, commercial-quality keys make it simple to enter numbers correctly the first time. The 12-digit display handles longer equations. Dual solar/battery power ensures the calculator is ready to use in any lighting conditions. Tax Calculation, Markup, and Grand Total keys, along with decimal slide switch, provide added functionality for business needs. Power Source(s): Battery; Solar; Display Notation: Numeric; Number of Display Digits: 12; Display Characters x Display Lines: 12 x 1.