The OEM Victor TUFFCALC is a waterproof and washable business calculator featuring a large 12-digit display and a sealed rubber keypad. It is designed to withstand harsh working conditions, making it ideal for environments where weather, dirt, or germs are a concern. This calculator can be easily washed with soap and water, ensuring cleanliness and hygiene. It includes various functions such as tax +/- keys, backspace, grand total, 3-key memory, square root, and change sign, and operates on hybrid power with solar and battery backup.