Revolutionize your calculations with our innovative 2-in-1 Calculator! This smart scientific calculator seamlessly integrates with an LCD writing tablet, making it perfect for efficient calculations including addition, subtraction, multiplication, division, fractions, percentages, and tax conversions. The large LCD screen displays up to 12 digits, ensuring data is clear and easy to read. Experience accurate calculations with our basic office calculator, featuring an independent computing chip that quickly processes multi-page calculations with precision. It not only rapidly computes complex formulas but also provides correct answers, significantly boosting work and study efficiency. Enjoy quiet operation with our handwritten basic calculator, equipped with silicone buttons that are clearly concave and convex for a comfortable feel, ideal for daily calculations. Its silent design ensures no disturbance to others, making it perfect for work, business, accounting, and student learning. Designed for portability and lightness, this pocket calculator with a writing pad and stylus weighs only 6 ounces. Its compact size allows it to fit easily into a pocket, ready for immediate use whenever needed. Conveniently take notes directly on the graphing calculator. Benefit from a rechargeable calculator that consumes no power when writing; power is only used when clearing the screen. This desktop calculator boasts a long standby time and is equipped with a 120mA lithium-ion battery, rechargeable via a Type-C data cable. A full charge typically takes 1.5 hours and provides approximately three to six months of use.