Key specifications/functions: A basic calculator featuring algebraic logic and 7 main functions (including addition, subtraction, multiplication, division, percentage calculation, and square root extraction). Memory: Equipped with a 7+3 memory function (R•CM, M-, M+). Keys: The device has a total of 25 rubber or plastic keys. Display: An energy-efficient liquid crystal display (LCD) capable of showing up to 8 digits, including status indicators. Power supply: Operates independently of mains power using 2 AA batteries (power consumption of only 0.0003 watts). The calculator is in good condition with a few user traces. The calculator will be packed carefully with the original cover.