Eight-digit, professional calculator features an extra-large LCD that displays larger digits to prevent reading errors. Durable plastic keys are properly spaced for fast and accurate data entry. Twin-power operation runs on solar energy with a battery backup to deliver consistent, reliable performance in any environment. Other functions include automatic tax keys, three-key independent memory, extra-large plus key, automatic power down and more. Pocket-size calculator is perfect for business professionals on-the-go.