Fangrui Product Details Calculator 12-digit Oversized Lcd Display Oversized Buttons Battery And Solar Powered Power Supplies Standard Features Large Calculator For Home School Features: Desktop Calculator: Highly Accurate 12-digit Display For Calculations. Power Supply System: Solar And Battery, Using A Constant Power Supply. Extra Large Lcd Display, Clear And To Read. Unique And Colorful, Popular Among Students And Office Workers. And Energy Saving: Solar And Battery Power Supply, Energy Saving And , Reduce The Frequency Of Battery , Prolong The Service Life. Portable And Efficient: Compact And Lightweight, To Carry, Suitable For Students, Office And Home Use, Calculating Anytime, Anywhere. Multi-functional Buttons: Equipped With A Variety Of Functional Buttons, Including Percentage, , Clear, Etc., To Meet Different Calculation Needs, To Operate. Large Screen Display: High-definition Display With Clear And Easy-to-read Numbers, Convenient To Check The Calculation Results And Reduce Misinterpretation. : Solar Power Calculator - And Energy-saving, Portable And Efficient, Suitable For Students, Office And Home Use Packing List: 1x Calculator Power Supply