1. Have You Ever Felt Troublesome To Remember The Result Of Numbers During The Calculation Process, But Could Not Find Paper And Pen To Record It This Financial Calculator Combined With Lcd Writing Board Can Perfectly Solve This Problem. It Is Designed By A Japanese Designer Who Pursues And Paperless Environmental Protection, You Can Take Notes During Calculations, Calls And Meetings, And Improve Your Study And Work Efficiency.2. The Basic Calculator Is perfect For Keeping Information For Kids And Yourself, And Effectively Do Mortgage Calculator And Tax Conversion For Finance, Office, Withdrawal. Accounting, School And Home Use.3. Can Be Carried Anywhere, Take It Off And Use It Immediately When Necessary, Easy To Carry4. Daily Use, Very Suitable For An Eco-Friendly Lifestyle Choice.5. Best Gift: The . It Can Be An Educational Toy For Preschoolers. It Can Be A Travel Toy For Long Drives And Road Trips. Great Parent-Child Gift For Girls And Boys Ages 3and On 'S Day, , Homeschooling, Easter, Birthdays, Children'S Day, Thanksgiving, Christmas And Any Occasion!Basic Parameters For Handwritting Area:Dimension:15.1x17.3cmWriting Tablet: 148mmx75mmRun Temperature For Writing Area : 0-40Input Pressure For Writing Area: 200-300gBattery Type: CR1220 or 40MAHFilm Hardness For Handwriting Area: 3hCalculator Basic Parameters:Battery Type:LR1130 or 1.5V or 68mAhCalculator Display:12 Digits LCDTurn Off:Smart Automatic Power OffKey:Silicone KeyColour:GrayMaterial:plasticPackage Contents:1 x Calculator Tablet1 x StylusOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.