The customer comes first! If you have any dissatisfaction with the product, we support full refund within 30 days! 10-Bit Solar Foldable Calculator LCD Digital Writing Board Electronic Scientific Tablet Hand-Painted Drawing Pad With Stylus Pen Features: 【Calculator with Notepad】Equipped with 6.5 Inch writing tablet, you can take notes or graph while calculating by using the stylus pen in the bottom left side. Solar charging, do not worry about the use of no power. The battery can be replaced. 【Lightweight & Portable】The pocket calculator, can be folded as small size, you can put it in your pocket, briefcases or schoolbag to office, school. 【More Sensitive Key】The button of basic calculator is made of premium ABS plastic material, which is more sensitive than button. Repeated press will not interfere with its sensitivity. 【Intelligent computer tablet】Can repeatedly write 50,000 times, LCD handwriting screen. Comfortable handwriting, simulating real book handwriting. Magnetic absorption nano] stylus, not easy to lose, easy magnetic absorption. One-click lock screen on the side to prevent] accidental deletion. 【Locked and Unlocked Design】You can keep your notes through turning the button into the locked position. And if you want to erase] the notes, please turn it into the unlocked position and click the delete button to erase] them. Product Description: Product name: Handwriting computer Color: Black Material: ABS Viflosae 10-Bit Solar Foldable Calculator LCD Digital Writing Board Electronic Scientific Tablet Hand-Painted Drawing Pad With Stylus Pen Electronics Gadgets Up to 40% Off 【Calculator with Notepad】Equipped with 6.5 Inch writing tablet, you can take notes or graph while calculating by using the stylus pen in the bottom left side. Solar charging, do not worry about the use of no power. The battery can be replaced. 【Lightweight & Portable】The pocket calculator, can be folded as small size, you can put it in your pocket, briefcases or schoolbag to office, school. 【More Sensitive Key】The button of basic calculator is made of premium ABS plastic material, which is more sensitive than button. Repeated press will not interfere with its sensitivity. 【Intelligent computer tablet】Can repeatedly write 50,000 times, LCD handwriting screen. Comfortable handwriting, simulating real book handwriting. Magnetic absorption nano] stylus, not easy to lose, easy magnetic absorption. One-click lock screen on the side to prevent] accidental deletion.