1. Health and Environmental : Blue matte LCD screen, protecting eyes. It can be written repeatedly, reducing paper consumption, environmentally friendly, dust free and ink free. Press the clear button to erase LCD notes and protect personalprivacy. 2. Improve Learning and Work Efficiency: The 6 inch calculator and erasable LCD notebook are designed in one piece, with a handwriting pen attached to one side. You can take notes while calculating, improve learning and work efficiency. 3. Lightweight and Portable: This is a pocket mini calculator with an erasable writing pad and foldable design, weighing about 165 kilos. It is very compact and can be carried in a pocket. It can be quickly removed and used immediately when needed. 4. Silent Design: Our basic calculator keyboard is made of premium silicone material, with soft touch and comfortable, quiet, and noise free touch. Using this calculator, you will not interfere with others or affect your own thinking when calculating data. 5. : The computer has been carefully crafted with silicone buttons that are not easily detached and wear‑resistant. After use, the computer can be closed like a book to avoid damaging the keyboard. Specification: Item Type:Calculator with Notepad Product Material: ABS+LCD Battery: button battery CR2025 (built-in)  Capacity: 170 mAh Product Size: 150 x 90 x 15 mm / 5.91 x 3.54 x 0.59 in Notepad Size: 6 in Number of Digits: 10+2bit Package List: 1 x Calculator with Notepad 1 x Instructions