Sharp 12-digit calculator features an extra-large tilt display with a kickstand for easy viewing on your desktop whether you re at home or in the office. Answer check function lets you know when the calculation being checked matches the results of the previous calculation. Twin-power operation runs on solar energy with a battery backup to deliver consistent reliable use in any environment. Backspace key allows you to make quick single-digit corrections for time-saving use. Commercial calculator also includes item count resume function markup key rounding slide switch automatic tax keys automatic power down and more.