Size: 12.94 * 12.9 * 2.65cm/5.09 *5.08 *1.04 inch Material: Plastic Color: black Specifications: 12-bit calculator 1:12 digit widescreen display, meet the daily large calculation needs, large screens and fonts to clearly observe the calculation results 2: High-penetrating acrylic plate protection display panel, protect the screen, not easy to draw 3: Battery + solar dual power drive, long-lasting, long working hours 4: Use a plastic button, clear number, comfortable, not easy to wear 5: Comfortable tilt angle, make the calculator's screen of the natural state of the human eye 6: With 120 steps, each step is calculated before the review