Features: This professional scientific calculator with protective hard shell keeps calculator from being damaged. 12digits widescreen display. 2-line display shows entry and calculated result at same time. With 240 scientific functions.Easily handles 1 and 2 variable statistical calculations and three angle modes and scientific/engineering notation modes. Features button cell or 2AAA batteries power supply(battery not included) for optional use. Protective hard shell to prevent it from scratches, for high school students, college students and professionals. Calculator only, other accessories demo in the picture is not included! Specifications: Item Type: Calculator Material: Plastic Size: about 8x15x1.50cm/3.15x5.9x0.59in Features: 12digits widescreen display;240 scientific functions Quantity: 1Pc Package Includes: 1PC Scientific Calculator note: A, to D models with button cell, and you don't need to prepare your own batteries. Some optional models do not have button cell, so you need to bring your own 2xAAA batteries.