Health and Environmental Protection: Features a blue matte LCD screen that protects your eyes. It can be written on repeatedly, reducing paper consumption, and is eco-friendly, dust-free, and ink-free. Press the erase button to clear LCD notes and protect personal privacy. Improve Learning and Work Efficiency: The 6-inch calculator and erasable LCD notepad are integrated into one unit, with a handwriting pen attached. You can take notes while calculating, boosting learning and work efficiency. Lightweight and Portable: This mini pocket calculator with an erasable writing board and foldable design weighs approximately 165g. It's very compact and fits easily in a pocket, ready for immediate use when needed. Silent Design: Our basic calculator keyboard is made of premium silicone material, offering a soft touch and comfortable, quiet, and soundless typing experience. Using this calculator won't disturb others or affect your own thinking during calculations. Durable: The calculator is meticulously crafted with silicone buttons that are not easily detached and are wear-resistant. After use, the calculator can be closed like a book to prevent damage to the keyboard. Item Type: Calculator with Notepad Product Material: ABS+LCD Battery: Button cell battery CR2025 (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 bit 1 x Calculator with Notepad 1 x Instructions