Casio 10-Digits Calculator, DS-1B, Grey/Black

Key operations are stored in a buffer, so that nothing is lost even during high-speed input Keys are specially designed for silent operation when compared to previous CASIO calculators to help maintain a more pleasant working environment Large rubber feet on the bottom of the calculator keep it from slipping during operation A symbol on the display indicates the status of the operation you are currently performing Keys are ergonomically shaped and configured to match natural finger movements Power source is solar and battery Key is made up of plastic and finishing material is metal