Size: 21.6 * 16 * 4.1cm Material: Metal Color: silver Specifications: 16-bit calculator 1:16 Big widescreen display, meet the daily large calculation needs, large screen and font 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: 112 Step of the Review Function, the following steps calculated before the review