White Desktop Calculator with LCD Screen, Sensitive Buttons, Solar and Battery Powered Calculator for Teachers, Students and Office 【Product Size】100*157*30mm. 【DUAL SOLAR & BATTERY POWERED】 Solar power and battery can power the calculator (battery included). The solar calculator has an auto power-off function. 【12-Digit Display】 12 digits power a financial calculator for numerous calculations. Suitable for businessmen, workers, teachers, students, or anyone needing to perform calculations. 【Sensitive Large Buttons】 The desktop calculator adopts a scientific, large button design that conforms to people's usage habits, comfortable to press. 【4 Non-Slip Pads】 The large-key calculator comes with 4 non-slip pads to prevent it from sliding during use and avoid damaging the desk. 【Note】The calculator's screen may be difficult to read in low light without batteries. If you need to use it in low light, please insert AAA batteries.