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.