[Multi-Function]It Both a Calculator,a Drawing Board,a Notepad and a Writing .You can make notes while calculating, study and work efficiency [Lightweight and Portable]This is a lightweight calculator and writing have a stylus,foldable design, only 0.3lb.you can carry it in your pocket, bag to make you can use it whenever and wherever. [Protect Your Eyes]This calculator has a display and 12-Digit,and there is no light blue with the LCD writing ,it will protect you eyes when you us it. [Save Electricity]We will put 1 battery inside the calculator which usually use onw year.when you writing on the lcd ,it doesn't consume electricity,and it will off after a few seconds if you 't use it. [ Design]This is a solar and battery financial calculator(battery included),it can be fully powered in any lit environment color:Grey Material:ABS Package Contents: 1 x Calculator with Writing 1 x English instruction manual 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm. [ and Portable]This is a calculator and writing tablet have a stylus,foldable design, only 0.3lb.you can carry it in your pocket, bag to make sure you can use it whenever and wherever. [Multi-Function]It Both a Calculator,a Drawing Board,a Notepad and a Writing Tablet .You can make notes while calculating,improve study and work efficiency [Dual Power Design]This is a solar and battery dual power financial calculator(battery included),it can be fully powered in any lit environment [Save Electricity]We will put 1 battery inside the calculator which usually use onw year.when you writing on the lcd tablet,it doesn't consume electricity,and it will off after a few seconds if you don't use it. [Protect Your Eyes]This calculator has a large display and 12-Digit,and there is no light blue with the LCD writing tablet,it will protect you eyes when you us it.