Eight-digit, mini-desktop calculator features an extra-large LCD that displays crisp, clear digits to prevent reading errors. Durable keys are appropriately spaced for fast, accurate data entry. Backspace key allows you to make quick, single-digit corrections for time-saving use. Twin-power operation runs on solar energy with a battery backup to deliver consistent, reliable performance in any environment. Calculator also includes automatic tax keys, percent key, square root key, four-key independent memory and more. Professional calculator is perfect for business professionals at home or in the office. compatible with Sharp EL-310WB 8 Digit Professional Mini-Desktop Calculator, White, 1 Each (Quantity) Extra-large, angled LCD displays crisp digits to prevent reading errors Durable keys are comfortably spaced for accurate data entry Backspace key allows fast, simple corrections for time-saving use Twin-power operation ensures consistent, reliable use in any environment Includes automatic tax keys, percent key, square root key, and four-key independent memory