Eightdigit calculator features a compact, pocketsize design that can be stored virtually anywhere for business professionals onthego Large LCD provides a crisp, clear display to help prevent reading errors Durable keys are appropriately spaced for fast, accurate data entry Twinpower operation runs on solar energy with a battery backup to deliver consistent, reliable performance in any environment Pocket calculator also includes automatic tax keys, percent key, threekey independent memory, extralarge plus key, automatic power down and more