Fangrui Product Details 2 In 1 Calculator Writing Tablet Design: The Calculator Is A Combination Of Calculation And Notebook With A Stylus Pen, It Allows You To Write And Calculate Simultaneously, Making It A Tool For Busy Professionals. Battery Powered: The Calculator With Time Function Is Powered By 1 Cr2032 And 2pcs Lr1130 Batteries, That Assists In Managing Your Time Effectively, Ensuring That You Dont Miss Any Important Deadlines Or Appointments. Healthy And Eco-friendly: Calculator With Notepad Is Not Only Eco-friendly But Also Promotes A Healthier Writing Experience By Reducing Eye Strain And Hand Fatigue Associated With Traditional Paper And Pen Writing. Convenient Portable: It Is Easy To Take Your Calculator With Writing Tablet On-the-go, Ensuring You Have Your Trusty Calculator And Notepad With You. Wide Application: Basic Calculator With Tablet Makes It An Ideal Tool For Anyone Who Needs To Perform Quick And Accurate Calculations, From Students And Teachers To Business Professionals And Accountants.