12-digit, desktop calculator with a kickstand features an extra-large LCD to clearly show each digit and help prevent reading errors. Extra-wide keyboard allows you to accurately input your data for consistent operation. Multiple Use key simplifies business calculations to save time and increases efficiency by handling functions like margin, markup, selling prices, costs and percent changes. Twin-power operation runs on solar energy with a battery backup to deliver consistent, reliable use in any environment. Commercial calculator also includes percent key, square root, sign change key, auto power off, accumulation function and more.