Welcome to our store! 1. Health and Environmental Protection: Blue matte LCD screen protects your eyes. It can be written on repeatedly, reducing paper consumption, making it environmentally friendly, dust-free, and ink-free. Press the delete button to erase LCD notes and protect personal privacy. 2. Improve Learning and Work Efficiency: The 6-inch mini calculator and erasable LCD notepad are designed as one piece, with a handwriting pen attached to one side. You can take notes while calculating, improving learning and work efficiency. 3. Lightweight and Portable: This is a pocket-sized mini calculator with an erasable writing pad and foldable design, weighing approximately 165 grams. It is very compact and can be carried in a pocket. It can be quickly taken out and used immediately when needed. 4. Silent Design: Our basic calculator keyboard is made of premium silicone material, with a soft touch and comfortable, quiet, and noise-free operation. Using this calculator will not disturb others or affect your own thinking when calculating data. 5. Durable: The calculator has been carefully manufactured with silicone buttons that do not easily come loose and are durable. After use, the calculator can be closed like a book to avoid damaging the keyboard. Item Type: Calculator with Notepad Product Material: ABS+LCD Battery: CR2025 button cell battery (built-in) Capacity: 170 mAh Product Size: 150 x 90 x 15 mm / 5.91 x 3.54 x 0.59 inches Notepad Size: 6 inches Number of Digits: 10+2 bits Includes: 1 x Calculator with Notepad 1 x Instructions If you find any product problems after receiving the goods, such as damage or incorrect quantity of goods, please contact the seller immediately. We will do our best to provide you with satisfactory customer service.