Features: Robust, professional grade scientific calculator. 2-line display: show entry and calculated result at the same time. Easily handles 1 and 2 variable statistical calculations, three angle modes (degrees, and grads), and scientific/engineering notation modes. Slide-off protective hard case. Ideal for high school students, college students and professionals. Specification: Material:plastic Color:black Size(L×w):about 15×9 cm Power by: 2 × button batteries(included) Package Included:1 × scientific calculator Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.