Size: A: 15.35 * 12.04 * 2.98CM B: 18.07 * 14.42 * 3.97CM Material: Metal Control Plate + Plastic Buttons Color: silver 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 7: With automatic power failure function, extend machine life, save energy