Multifunctional Scientific Calculator: Combining a scientific calculator and whiteboard, the stylus is hidden behind the calculator, allowing you to calculate and record anytime, effectively improving learning and work efficiency. Clear 12-digit display for easy calculation. Easy to use, suitable for students and office use. Lightweight and Portable: The flip design of the pocket calculator protects the mechanical calculator's keyboard and whiteboard. It's easy to carry and quickly remove when needed for immediate use, convenient for quick note-taking, calls, and meeting minutes. Eco-Friendly: The desktop calculator is powered by a replaceable CR2025 battery. Operating time: 12-18 months, standby time: 18-24 months; Energy-saving and longer standby time, no need to worry about low battery. Scientific calculators use a matte blue LCD screen to protect your eyes. The whiteboard text is also clearly visible in sunlight. Paperless environmental protection, reusable writing. Dual-Line Display: Dual-line display screen design, the first line shows the calculation process, the second line shows the calculation result. Press the delete button to erase notes from the LCD screen and protect privacy. The special one-button lock function prevents accidental deletion of important information. Quiet Design: The desktop calculator keyboard is made of high-quality silicone material, which is more sensitive, scratch-resistant, wear-resistant, and durable, providing a more comfortable touch and silent operation, suitable for office work, accounting calculations, student computer studies, and various usage scenarios.