Canon 8-digit pocket calculator, dual power, ls555h, 4-1/3″ x 2-2/3″ x 3/5″, black fold-out wallet calculator features an eight-digit, liquid crystal display (lcd) and four-key memory. Mathematical features include square root, percentage, sign change, and variable decimal. Fold-over design and sturdy hard cover casing offer protection and convenience during transport. 2 oz. Calculator runs on battery and solar power and automatically shuts down after seven minutes of nonuse. functions square root percentage sign change variable decimal four-key memory calculator features hard shell cover auto power off larger quantity quotes available. Please call 1-888-978-7759. this product arrives to most customers in 2-3 business days.