Multi-function Scientific CalculatorsCombination of scientific calculator and writeboard, stylus hidden behind the calculator, calculate and record at any time, effectively improve learning and work efficiency, clear 12-digit display for easy calculation. Easy to operate, suitable for students and office. Lightweight & Portable The flip design of the pocket calculator can protect the mechanical calculator keyboard and whiteboard well, is easy to carry and quick to pull out when needed for immediate use, handy for taking quick notes, calls, and meeting minutes. Eco-FriendlyThe desk calculator is powered by CR2025 battery, it can be replaced at any time. Working time:12-18 months, stand-by time:18-24 months; saving energy and longer stand-by time, no need worry about low battery power. Scientific calculators use blue matte LCD screen to protect the eyes, The writeboard text can also be read clearly in the sun. Paperless environmental protection, repeatable writing. Double-line DisplayDouble-line display screen design, the first line shows the calculation process, the second line shows the calculation result. Press the clear key to erase the LCD notes and protect personal privacy. Special one-key lock function can prevent important information from accidentally being deleted. Quiet DesignThe office calculators keyboard is made of high-quality silicone material, higher sensitivity, wear-resistant and durable, finger feels more comfortable, no noise in the keystroke process, suitable for office work business, accounting calculations, student computing study, and various use scenarios.