The Casio FX-260Solar Fraction Scientific Calculator is a handheld device powered by solar energy, making it convenient for on-the-go use. The calculator features an LCD display and a slide case for easy storage and protection. With regular key and display sizes, this scientific calculator from Casio is a reliable tool for solving complex equations in the office or industrial settings. The model Casio FX-260Solar is a tested and working product that offers precision and functionality for various mathematical tasks.