about this project Calculator with Writing Pad- This calculator is combined with an LCD writing pad. With the stylus behind the tablet, you can calculate and record very easily. This desktop calculator supports calculations of up to 10 digits, and the data is clear and easy to read, suitable for both advanced and beginners. ECO-FRIENDLY- With this 2-in-1 scientific calculator, you can calculate and record at any time, and you can also use the calculator as a notepad when you don't use it. The calculator has a button, you can click this erase button to clear the full screen, repeat writing, reduce paper consumption, and be environmentally friendly. Portable and Portable- This handwriting calculator only weighs 120 grams, and the lightweight clamshell design makes it easy to carry. 1. 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 to Replace Batteries- Built-in 2 button batteries, 1 calculator LR1120 battery, 1 CR1220 LCD writing tablet battery, you can replace it at any time without screw installation, no need to worry about the battery running out. Quiet Design- Our calculator keyboard is made of silicone material, which is soft to the touch, quiet and noiseless. With this calculator, you will not interfere with others when calculating data, very suitable for work and study.