About this project: Calculator with Writing Tablet: This calculator combines a calculator with an LCD writing tablet. Use the included stylus on the back of the tablet for easy calculations and note-taking. This desktop calculator supports calculations up to 10 digits, with clear and easy-to-read data, suitable for both advanced users and beginners. Eco-Friendly: With this 2-in-1 scientific calculator, you can calculate and record at any time. You can also use the calculator as a notepad when not in use. The calculator has a one-button erase function, allowing you to clear the entire screen and reuse it, reducing paper consumption and being environmentally friendly. Portable and Lightweight: This handwriting calculator weighs only 120 grams, and the lightweight clamshell design makes it easy to carry. Product size: 160*80*10mm. You can carry it in your bag, pocket, or even your purse, perfect for office, classroom, and home use. Easy Battery Replacement: Built-in with 2 button batteries, 1 LR1120 calculator battery, and 1 CR1220 LCD writing tablet battery. You can replace them at any time without screws, so you don't have to worry about the battery running out. Silent Design: Our calculator keyboard is made of silicone material, which is soft to the touch, quiet, and silent. With this calculator, you won't disturb others when calculating data, making it very suitable for work and study.