Size: 20.5 * 13.2 * 3.5cm 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: With automatic power failure function, extend the machine life, save energy 5: One million button life, use plastic buttons, clear numbers, comfortable, not easy to wear 6: Comfortable tilt angle, make the calculator's screen of the natural state of the human eye