The Business Calculator and Multi-function Calculator are designed for efficient office work and complex calculation scenarios, integrating scientific calculations, financial statistics, unit conversions, and other functions to meet the diverse needs of businesspeople, financiers, and students. With accurate calculation, durable design and user-friendly interaction as the core, the products help users improve work efficiency. Scientific Computing supports advanced mathematical operations such as trigonometric functions, logarithms and exponentials to meet the needs of engineering and scientific research scenarios. Equipped with formula storage and recall function, it can save frequently used formulas and quickly recall them to reduce repeated input. Financial Statistics Functions Built-in financial-specific functions such as cash flow calculation, depreciation calculation, cost analysis, etc. It supports TVM (time value) calculation. Provides statistical modes for data processing such as mean, standard deviation and regression analysis. Unit Conversion and Tax Rate Calculation Supports length, weight, temperature, exchange rate and other commonly used unit conversion, one-key switch. Built-in tax rate calculation function supports automatic calculation of VAT, consumption tax and other taxes. Dual power supply design Solar power combined with button battery backup to ensure continuous use in a long time without light environment. Large display and backlight design 12-bit or 16-bit LCD display, support multi-line display, clear and easy to read figures. Equipped with automatic backlight function, automatically switch on in low-light environment to enhance the convenience of use. Ergonomic Keys The key layout is ergonomic, comfortable to touch, responsive and reduces misuse. Anti-slip key design, even if the hands are sweaty can also be stable operation. Applicable Scenarios Business Office: financial analysis, cost control, tax declaration, etc. Education and training: maths, physics, engineering and other subjects teaching and examination. Daily life: family budgeting, shopping discount calculation, etc.