This calculator general purpose desktop calculator, perfect for home, office or store. Solar and battery dual power works even longer.
AA battery back-up. Note: AA battery not included in the package
Notice: If you find that the number does not display properly during use, please check if there is insufficient light or if the battery is not powered. It is highly recommended that you always install one AA battery to this calculator. It can save battery power when it is used at well lit, and it will work well when used in insufficient light. It is a gift, and it will perform well in your work and life. You will like it. If you have any question about the product, please feel free to contact us.