The Casio Fraction Mate Scientific Calculator Fx-55 is a handheld device that is powered by a combination of solar energy and a battery. The calculator is designed for scientific calculations and features a LCD display for easy viewing. With its compact size and two-way power source, it is ideal for students, professionals, and anyone in need of precise mathematical calculations. The blue color adds a stylish touch to this reliable and efficient calculator from Casio. Good used condition. There are minor marks and scratches as pictured. Functions great. Includes slide on cover and fraction mate double sided quick reference card.