Paperless handwriting calculator for drafts - Traditional calculators require paper and pen for drafts; this unit provides a paperless design by allowing drafting directly on the built-in handwriting area. Large LCD display for clarity and speed - LCD large screen display with 30% wider screen width. - Two-line display enables viewing inputs and results at the same time, making calculations more convenient and faster. Easy, reliable operation - One-click erase button clears the handwriting board contents. - Lock screen button prevents accidental deletion of notes and calculations. Versatile for many users - Suitable for office workers, finance professionals, engineers, individual cashiers, and students. Practical use scenarios - In meetings or on the go: draft calculations during planning without paper. - In finance or engineering tasks: sketch formulas and verify numbers quickly. - In classrooms or study sessions: solve problems and take notes directly on the device.