Feature:1. [Big Buttons] This calculator features large crystal keys that provide a comfortable and smooth typing experience, reducing the risk of errors during calculations.2. [14-Digit Display] With its clear 14-digit screen display, you can perform large calculations easily, making it an ideal tool for office work, accounting or student use.3. [Dual Power Sources] This scientific calculator operates on dual power sources - solar and 1 AA battery (not included), ensuring continuous and reliable power supply for your calculations.4. [Versatile Use] Whether it's for office work, accounting tasks or student homework, this calculator is designed to cater to a wide range of numerical computation needs, offering professional-grade reliability.5. [Portable And Convenient] Its compact design makes the ECO-007G an ideal travel companion. Lightweight and easy to carry, you can take it with you to work, school, or anywhere you need to perform calculations.Specification:Model: ECO-007GSize: 19.8x14.5cmWeight: 309gScreen: 14 digitsBattery: 1*AA(not included) , solar panelColor: GreyKey: Crystal KeyPackage List:1 x Calculator