Multifunctional calculator - tax, function and command symbols. On and off buttons, margin %, +, -, key rollover Size: 5.51"*4.92", suitable for office, student and home use. Bi-directional power: Solar (works only when bright) and battery (included, long battery life.). Automatic shutdown, energy saving and environmental protection. Display: The maximum display is a 12-bit large LCD screen, and the humanized 45-corner display design ensures that the human body will not feel tired during long-term use. Calculator, Xinyu Lighting Creative and Cute Solar Calculator, 12-Digit LCD Display,