The Casio FX-85GT CW Scientific Calculator is a handheld device that operates on solar power and batteries, making it convenient for use on the go. With a large LCD display and regular key size, it is ideal for students and professionals alike. Authenticated by the manufacturer, this Casio calculator is a reliable tool for solving scientific equations and calculations with ease. The authenticity of the product and the warranty of 1 month ensure its quality and durability, making it a valuable addition to any office or classroom setting.