The Victor 920 Scientific calculator features a large, 10-digit display to help prevent reading errors and ensure accurate calculations. Compact design allows you to store this calculator in your pocket, backpack or purse to keep it with you at all times. Protective hinged case protects the keys and display for long-lasting use. One-variable statistics include results for mean and standard deviation. Hybrid power operates on solar power with a battery backup for reliable operation. Scientific calculator is perfect for students in general math, science, algebra and trigonometry. Calculator functions also include logarithms, reciprocals, powers, roots, factorials, trigs and more.