Key specifications and features Number of digits: Very large screen displays up to 10 digits with high clarity. Power system: Operates on a dual power system (solar power when light is available, and battery when it is weak). Check function: Allows reviewing and correcting up to 300 calculation steps to avoid errors. Tax calculation: Allows calculating the price with or without tax at the touch of a button. Silent keys: Designed to be silent when pressed to ensure a quiet working environment. Indelible keys: Letters and numbers are engraved in plastic to ensure they are not erased with frequent use. This calculator is the Casio DS-1JT, a heavy-duty desktop calculator characterized by its high durability and support for advanced calculation functions. For sale