Basic Parameters For Handwritting Area: Dimension:15.1x17.3cm Writing Tablet: 148mmx75mm Run Temperature For Writing Area : 0-40℃ Input Pressure For Writing Area: 200~300g Battery Type: CR1220/40MAH Film Hardness For Handwriting Area: 3h Calculator Basic Parameters: Battery Type:LR1130/1.5V/68mAh Calculator Display:12 Digits LCD Turn Off:Smart Automatic Power Off Key:Silicone Key Colour:Gray Material:plastic Package Contents: 1 x Calculator Tablet 1 x Stylus Only 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. 3. Can Be Carried Anywhere, Take It Off And Use It Immediately When Necessary, Easy To Carry 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 Who Pursues And Paperless Environmental Protection, You Can Take Notes During Calculations, Calls And Meetings, And Improve Your Study And Work Efficiency. 4. Daily Use, Very Suitable For An Eco-Friendly Lifestyle Choice. 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. 5. Best : The . It Can Be An Educational Toy For Preschoolers. It Can Be A Travel Toy For Long Drives And Road Trips. Great Parent-Child For Girls And Boys Ages 3+ On Valentine'S Day, Back To School, Homeschooling, Easter, Birthdays, Children'S Day, Thanksgiving, Christmas And Any Occasion!