Fangrui Product Details Large And Sensitive Keyboard: This Desktop Calculator Features A 12-digit Lcd Display, Simple Calculations, And Very Complete Basic Numerical Calculations, Making It Ideal For Office, Elementary School, Market, Office, Home, School, And Even Home Use. Sensitive Keys, Easy To Use With A Single Click, And Provide Fast Data Entry. Elegant And Eye-catching: Our Rhinestone Calculator Is Beautiful And Is The Ultimate Accessory For Any Fashionable Woman. Versatile Power Supply: Our Crystal Converter Is Powered By Solar Energy And Batteries, Making It Convenient To Use Anytime, Anywhere. Automatic Shutdown, Energy Saving And Environmental Protection, This Converter Uses A High Conversion Rate Solar Panel, And Can Use Solar Energy Where The Light Source Shines. At The Same Time, We Provide Battery Installation (including One 7-cell Battery), Double Safety Power Supply. Efficient: This Basic Foreign Exchange Is Designed To Perform Complex Calculations Easily. Similar To A Mechanical Keyboard, The Mechanical Switch