Rechargeable Scientific Calculator with Notepad 991ES Black Science Calculator with Writing Tablet Foldable Scientific Calculators for High School College Students School Office Supplies(991ES-BL)on Sale

Powerful Calculation Functions: With 417 calculation functions, it can easily handle complex mathematical formulas, function operations, and data processing in scientific research, meeting the diverse calculation needs from middle school to college students and researchers.

Convenient Writing Pad: The unique LCD writing pad design allows you to record ideas, formula derivations or important data during the calculation process. No need to prepare additional paper and pen. Calculation and recording are carried out simultaneously, greatly improving learning and work efficiency.

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Dual Power Supply Modes: It adopts a dual power supply system of Type-C charging and solar power. There is no need to worry about running out of power. It can be quickly charged through a Type-C cable indoors. In outdoor or well-lit environments, the solar power supply can continuously provide energy for the calculator, which is environmentally friendly and practical.

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Portable and Easy to Carry: The foldable design makes it compact and convenient to carry. Whether it is carried in a schoolbag to school or taken to the library or laboratory, it will not take up too much space. Start an efficient calculation journey anytime and anywhere.

Wide Range of Applicable People: This calculator is specially designed for middle school students, high school students, college students and researchers, covering all learning and research stages. It is an ideal tool to accompany you in exploring and seeking knowledge in fields such as mathematics, physics and chemistry.