Calculator with Notepad Combination of basic calculator and writeboard, Touch pen fixed on one side of the board, calculate and record at any time, effectively improve learning and work efficiency, clear 10-digit display for easy calculation Lightweight and PortableThe 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 Solar and Battery Dual Power Two-button batteries can be replaced at any time without installing screws. The left solar calculator is powered by LR1120 battery or solar in sunlight environment without worrying about battery depletion.(NOTE: the right writeboard just powered by CR1220 battery and should install the battery before first use) Healthy and Eco-friendlyScientific 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. Press the clear key to erase the LCD notes and protect personal privacy Quiet Design The calculators keyboard is made of high-quality silicone material, finger feels more comfortable, no noise in the keystroke process, suitable for office work business, accounting calculations, student computing study, and various use scenarios