Canon ls100ts portable desktop business calculator, 10-digit lcd features business and sales calculations. With solar and battery power capabilities, it gets the job done no matter what the lighting conditions. Auto power off feature. Power source(s): battery; solar; display notation: numeric; number of display digits: 10. functions square root sign change business and sales calculations cost/sell/margin keys tax key memory keys sign change key calculator features auto power off larger quantity quotes available. Please call 1-888-978-7759. this product arrives to most customers in 2-3 business days.