Helect Calculator, Standard Function Desktop Calculator, Black School Office Calculator CalculatorAbout this School Office Calculator :Two-way Power School Office Calculator Calculator : Solar (works only when it is bright) and Battery (one AA battery NOT included). Note: * * Make sure one AA battery is inserted for continuous and accurate usageLarge 12-digit display School Office Calculator CalculatorTax and Currency conversion, Function and Command Signs School Office Calculator CalculatorOn and Off buttons, Profit margin %, +,-, Key Rollover School Office Calculator CalculatorDesktop School Office Calculator . Customer service from Helect School Office CalculatorSchool Office Calculator Power Source : Solar, BatterySchool Office Calculator Brand : HelectSchool Office Calculator Color : BlackSchool Office Calculator Batteries : 1 AA batteries required.School Office Calculator Dimensions LxWxH : 4.8 x 5.75 x 2.01 inches