2 in 1 Calculator: The smart scientific calculator is used in combination with the LCD writing board. The graphing calculator can be executed efficiently for everyone, including addition, subtraction, multiplication, division, fraction, percentage, and tax conversion. The large LCD screen can display up to 12 digits, and the data is clear and easy to readPrecise Calculation: Our basic office calculator has an independent calculation chip, which can quickly process multi-digit calculations and calculate accurately. Not only can quickly calculate complex formulas, but also give you the correct answers, which improves the efficiency of work and studySilent Buttons: The handwriting basic calculator uses silicone buttons, which are distinctly concave and convex, and feel very comfortable, suitable for daily calculations. When office calculator in use, it is quiet and no noise, and when calculating, it will not disturb others. It is a calculator suitable for work, business, accounting calculations, and student learning calculationsPortable & Lightweight: This is a pocket portable calculator with a writing tablet and pen, and weighs only 6 ounces. This portable calculator is very small and can be placed in a pocket, and can be quickly taken out to use immediately when you needed. It is convenient to take notes on the graphing calculatorRechargeable Calculator: When using a desktop calculator to write, it will not consume power. Only when the screen is cleared, the power will be used. This office desk calculator can be standby for a long time. Compared with the traditional calculator, it is equipped with a 120 mA lithium-ion battery, which can be charged with a type-c data cable. It usually takes 1.5 hours to fully charge, and can be used for about three to six months